The document provides details on the operations of the leaching, washing, and solvent extraction sections of the Konkola Copper Mines tailings leach plant. The leaching section uses pre-leach thickeners, agitators, and pachucas to dissolve copper from tailings using sulfuric acid. The washing section uses five counter-current decantation thickeners to separate leached copper solutions from solids. The solvent extraction section then purifies and concentrates the solutions before electrowinning produces copper cathodes.
Using A Hydraulic Ram to Pump Livestock WaterFifi62z
This document discusses using a hydraulic ram pump to pump livestock water from a flowing stream to a higher elevation. Hydraulic ram pumps use the energy in a falling column of water to pump water upwards without an external energy source. They work by creating water hammer pressure increases that open and close valves to pump a small amount of water with each cycle. Proper sizing of the ram pump, drive pipe, delivery pipe, fall, and lift are required for efficient operation. Tables provide guidance on estimating pump output and selecting an appropriately sized ram pump based on site characteristics. A surge tank can be used if the natural stream gradient is insufficient to provide the needed drive pipe fall.
Fast Flow Pumps produces small, portable hydraulic submersible pumps called Fast Flow pumps. These pumps have no mechanical seals, wear plates, gears, or other parts that typically cause wear and failure in centrifugal pumps. Despite their small size, Fast Flow pumps can produce very high flow rates. They are suitable for applications such as barge dewatering, construction site dewatering, and oilfield waste pumping due to their ability to handle solids and abrasives with minimal damage. Fast Flow pumps have a simple design that allows for easy repair in the field.
This document is an operating manual for CoolTech high performance vacuum pumps. It provides specifications for several pump models, describes pump components, gives warnings and operating instructions, and provides a troubleshooting guide. The manual emphasizes the pumps' high vacuum capability, gas ballast feature to prevent condensation, and lifetime filtration system. Maintenance instructions include changing the pump oil after each use to maintain performance.
The PA purifier system is designed to purify and clarify heavy fuel oils, lubricating oils, and distillate oils for marine vessels and power plants. It consists of a separator, change-over valve, and EPC50 control unit which automatically operates the system. The compact system takes up little space and requires few ancillary components, keeping installation and maintenance costs low. It effectively separates sludge and water from oils with high throughput capacities.
This document discusses new developments in hydraulic ram pump technology, including trends toward simpler pump designs that are easier to install and maintain. Specifically, it describes efforts to simplify pumps by removing tuning mechanisms, replacing free air pressure vessels with contained air packets, and designing pumps that can be easily attached and removed from drive pipes. The document also discusses using new materials like plastics to lower costs, especially for small pumps with modest lift requirements, while higher lift pumps still require materials with greater stiffness like steel. Overall the trends are aimed at making ram pump systems cheaper and more accessible for applications like small-scale irrigation.
A Manual on the Hydraulic Ram for Pumping VVater; by S. B. WattFatin62c
The document provides instructions for building a simple hydraulic ram pump from water pipe fittings. It can pump water to heights over 100 meters using only the power of falling water. The ram works by pumping a small fraction of the water flowing through it from a supply source to a level much higher than the source. It requires a minimum 1 meter fall from the source and a flow over 5 liters per minute. The document describes how to measure water flows, supply and delivery heads, design the ram, construct it, install it, tune it, and maintain it. It aims to enable field workers to build reliable rams and understand their operation.
This document describes an MOPX separation system for purifying or clarifying oils. The key components are an MOPX separator, ancillary equipment including an EPC-41 control unit, and optional equipment. The system can operate automatically to separate sludge and water from oil. It provides benefits like flexibility to operate as a purifier or clarifier, simple installation and maintenance, and a preventive maintenance program.
This document provides an overview of pipelines and tankers used to transport oil and gas. It defines different types of pipelines including trunk lines, transmission lines, and distribution lines. It also describes key pipeline components like compressor stations. The document outlines tanker types from crude oil carriers to LNG carriers. It discusses tanker architecture including hull designs and floating production and storage units.
Using A Hydraulic Ram to Pump Livestock WaterFifi62z
This document discusses using a hydraulic ram pump to pump livestock water from a flowing stream to a higher elevation. Hydraulic ram pumps use the energy in a falling column of water to pump water upwards without an external energy source. They work by creating water hammer pressure increases that open and close valves to pump a small amount of water with each cycle. Proper sizing of the ram pump, drive pipe, delivery pipe, fall, and lift are required for efficient operation. Tables provide guidance on estimating pump output and selecting an appropriately sized ram pump based on site characteristics. A surge tank can be used if the natural stream gradient is insufficient to provide the needed drive pipe fall.
Fast Flow Pumps produces small, portable hydraulic submersible pumps called Fast Flow pumps. These pumps have no mechanical seals, wear plates, gears, or other parts that typically cause wear and failure in centrifugal pumps. Despite their small size, Fast Flow pumps can produce very high flow rates. They are suitable for applications such as barge dewatering, construction site dewatering, and oilfield waste pumping due to their ability to handle solids and abrasives with minimal damage. Fast Flow pumps have a simple design that allows for easy repair in the field.
This document is an operating manual for CoolTech high performance vacuum pumps. It provides specifications for several pump models, describes pump components, gives warnings and operating instructions, and provides a troubleshooting guide. The manual emphasizes the pumps' high vacuum capability, gas ballast feature to prevent condensation, and lifetime filtration system. Maintenance instructions include changing the pump oil after each use to maintain performance.
The PA purifier system is designed to purify and clarify heavy fuel oils, lubricating oils, and distillate oils for marine vessels and power plants. It consists of a separator, change-over valve, and EPC50 control unit which automatically operates the system. The compact system takes up little space and requires few ancillary components, keeping installation and maintenance costs low. It effectively separates sludge and water from oils with high throughput capacities.
This document discusses new developments in hydraulic ram pump technology, including trends toward simpler pump designs that are easier to install and maintain. Specifically, it describes efforts to simplify pumps by removing tuning mechanisms, replacing free air pressure vessels with contained air packets, and designing pumps that can be easily attached and removed from drive pipes. The document also discusses using new materials like plastics to lower costs, especially for small pumps with modest lift requirements, while higher lift pumps still require materials with greater stiffness like steel. Overall the trends are aimed at making ram pump systems cheaper and more accessible for applications like small-scale irrigation.
A Manual on the Hydraulic Ram for Pumping VVater; by S. B. WattFatin62c
The document provides instructions for building a simple hydraulic ram pump from water pipe fittings. It can pump water to heights over 100 meters using only the power of falling water. The ram works by pumping a small fraction of the water flowing through it from a supply source to a level much higher than the source. It requires a minimum 1 meter fall from the source and a flow over 5 liters per minute. The document describes how to measure water flows, supply and delivery heads, design the ram, construct it, install it, tune it, and maintain it. It aims to enable field workers to build reliable rams and understand their operation.
This document describes an MOPX separation system for purifying or clarifying oils. The key components are an MOPX separator, ancillary equipment including an EPC-41 control unit, and optional equipment. The system can operate automatically to separate sludge and water from oil. It provides benefits like flexibility to operate as a purifier or clarifier, simple installation and maintenance, and a preventive maintenance program.
This document provides an overview of pipelines and tankers used to transport oil and gas. It defines different types of pipelines including trunk lines, transmission lines, and distribution lines. It also describes key pipeline components like compressor stations. The document outlines tanker types from crude oil carriers to LNG carriers. It discusses tanker architecture including hull designs and floating production and storage units.
This document provides instructions for operating and maintaining a high speed separator. It begins with safety instructions, emphasizing that the separator contains rapidly rotating parts that can cause serious injury if not properly handled. It then provides an overview of separator components and functions, including separating materials by centrifugal force. The bulk of the document contains maintenance procedures like periodic checks, part replacements, and disassembly/reassembly instructions. It aims to ensure safe and effective operation of the separator.
Gaviotas Hyidraulic Ram Pump: Installation, Operation and Maintenance ManualFatin62c
The document provides installation, operation and maintenance instructions for the Gaviotas Hydraulic Ram pump. It describes the pump's parts and functioning, requiring only a 1-4 meter waterfall of water to pump water long distances without electricity. Installation requires a minimum available flow of 40 liters per minute. Common maintenance issues addressed are an obstructed air vent causing no air in the chamber, and a worn high pressure sealing in the unloading valve.
The Glockemann Ram Pump: Site and Installation GuideFifi62z
The document provides guidelines for installing a Glockemann pump, including selecting a site with a water source that has a minimum flow rate of 1 liter/second and drop of half a meter, measuring the flow rate, drop, and delivery head to select the proper pump model, and instructions for constructing a weir or utilizing natural drops and installing the drive tube and pump securely.
Hydraulic Ram Pump: Consumers guide - Delft University of TechnologyFatin62c
This document provides a guide for consumers on hydraulic rams for water supply. It discusses appropriate water supply options and explains that hydraulic rams can provide water supply in areas with sufficient water flow and elevation change. The document describes the components and basic requirements of a hydraulic ram system, including adequate water source flow, supply head, and delivery head. It also covers site selection factors and installation/maintenance considerations. Appendices provide additional details on hydraulic ram operation, testing results, examples, manufacturer addresses.
The Basic’s of Hydraulic Ram Pumps - Rain Tree FoundationFifi62z
The document provides information about hydraulic ram pumps, including their history, parts, operation, and site installation considerations. It discusses how Joseph Michel Montgolfier invented the first self-acting ram pump in 1796. Over time, hundreds of ram pump designs were manufactured worldwide. The document outlines the basic parts of a ram pump and how they operate using diagrams. It stresses the importance of properly surveying a site to choose the right ram pump model and configuration based on factors like available water source and needed delivery height.
This document provides guidance on surveying, designing, and installing hydraulic ram pumps in Nepal. Key steps in the process include measuring the vertical fall from the water source to the pump site, the vertical lift from the pump to the delivery point, and the available water flow. These measurements are used to calculate the expected water output and size the pump appropriately. The document also discusses intake design, drivepipe and delivery pipe installation, and incorporating hydraulic rams into existing gravity flow water systems. The overall aim is to provide villagers with a simple, low-maintenance water pumping solution that can improve lives by reducing water collection times.
A hydraulic ram, or hydram, is a cyclic water pump powered by hydropower. It takes in water at one "hydraulic head" (pressure) and flow rate, and outputs water at a higher hydraulic head and lower flow rate. The device uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started. The hydraulic ram is sometimes used in remote areas, where there is both a source of low-head hydropower and a need for pumping water to a destination higher in elevation than the source. In this situation, the ram is often useful, since it requires no outside source of power other than the kinetic energy of flowing water.
A hydraulic ram is a cyclic water pump powered by hydropower that takes in water at one pressure and flow rate and outputs it at a higher pressure but lower flow rate. It has no external energy input and can operate continuously. The components of one hydraulic ram project included a drive pipe, two check valves, an air chamber bottle, a delivery pipe, a source tank, and connectors. It was able to lift water 14 feet using a source height of only 2.75 feet, with an estimated cost of 1000-1200 taka. Hydraulic rams have benefits of using renewable energy at low cost but are limited to hilly areas and have low volumetric efficiency.
This document discusses the design of a hydraulic ram pump to transfer water from a river into a water tank 20 meters high. It begins with an abstract and objectives stating the goal is to design a hydraulic ram pump that can fill a 1200 cubic meter water tank from a river with a flow rate of 120 cubic meters per second. It then reviews the literature on hydraulic ram pumps, discussing their history, working principles, and advantages for developing areas without access to electricity. The document explains that a hydraulic ram pump uses the kinetic energy of flowing water to pump a smaller volume of water to a higher elevation, with only two moving parts. It aims to design a suitable ram pump for the given conditions and river water source.
Home Made Hydraulic Ram Pump - Part 1
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Huerto Ecológico, Tecnologías Sostenibles, Agricultura Organica
http://scribd.com/doc/239850233
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
This document summarizes a student project report on a hydraulic ram pump. It includes sections on the acknowledgements, introduction, working principle, applications and limitations, design considerations, and conclusions. The project was guided by lecturers from the mechanical engineering department and aimed to study how hydraulic ram pumps can be used to pump water from streams or springs to higher elevations in a simple and reliable way using renewable energy. The summary highlights the key components and working cycle of ram pumps in lifting a small amount of water a great height using the energy of a larger falling water flow.
The document discusses two options for developing the Tentalum oil field:
1. Export the oil via a 50km offshore pipeline and 500km onshore pipeline to an existing onshore facility. A fixed piled structure is recommended to process the oil offshore before export via pipeline.
2. Blend the Tentalum oil with the existing production from the nearby Palladium Platform. This option would be initially cheaper but may not be as financially beneficial long-term.
The document recommends the first option of building an offshore structure and exporting via pipeline, as relying solely on the Palladium Platform seems risky without additional infrastructure.
Ram Pump - Installation Manual
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Huerto Ecológico, Tecnologías Sostenibles, Agricultura Organica
http://scribd.com/doc/239850233
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
The document discusses the hydraulic ram pump, which uses the energy of flowing water to pump a small amount of water to a higher elevation without external power. It provides a brief history of the technology and its inventors. The key parts and types of ram pumps are identified. Common operational problems and solutions are outlined. Advantages include being powered solely by water flow, having few moving parts, and providing continual operation. Disadvantages include only pumping a small portion of water and potential sediment issues.
Theory and Application of Hydraulic Ram Pumps (Hydrams) - S HazarikaFifi62z
The document discusses hydraulic ram pumps (hydrams), which use the potential energy of falling water to lift a small portion of water to a greater height. Hydrams are simple, reliable, and require minimal maintenance, making them suitable for rural water supply and irrigation where other power sources are not available. The document describes the components and design of hydram systems, including intake, drive pipe, ram, supply line, and storage tank. It provides equations and tables to design hydram systems based on water supply, fall height, lift height, and desired water delivery. The document also discusses applications and limitations of hydrams.
Nesh Mucibabic led the design of a 36 MGD Rock Creek Excess Flow Pump Station and two 5 MG holding basins to temporarily divert peak sanitary flows from a 54-inch interceptor and release the stored flows in a controlled manner. The diversion deferred needed capacity upgrades to the Rock Creek Water Treatment Plant. Nesh designed the dry well/wet well pump station with five submersible pumps, self-cleaning wet well, wet well drain pump, diversion and flow control structures, force main, overflow lines, and diversion valves. He was also responsible for the diversion system hydrology and hydraulic calculations and operation. The city thanked Nesh for his leadership, diligence, and thoroughness on the
Home Built Hydraulic Ram Pumps - NW Independent Power ResourcesFatin62c
This document provides instructions for building two types of homemade hydraulic ram pumps (HRP1-1 and HRP2-2) that can pump water without electricity. It explains how hydraulic ram pumps work by using the kinetic energy of flowing water to lift a portion of the water to a higher storage tank. The document gives details on selecting a water source, installing intake and drive pipes, constructing valves and pressure chambers, and provides illustrations of the pump's operating sequence. Proper setup and maintenance are emphasized to maximize the pump's efficiency and longevity.
This document provides instructions for building a homemade hydraulic ram pump. It includes a list of parts needed to construct a 1-1/4 inch pump, diagrams labeling the parts, and descriptions of how each component works and connects together. Performance expectations are provided in tables, including expected water output rates based on input rates and installation specifications. Test data from a sample 1-1/4 inch pump installation is shown to output around 0.33 gallons per minute with a shutoff head of 22 psi and operating head of 10 psi.
Method Statement for Powerflushing Domestic SystemsFernox
This method statement has been written as a guide for cleaning of existing domestic central heating systems using a Fernox Powerflow Flushing unit in conjunction with Fernox cleaning products. System cleanliness is checked using a Fernox Total Dissolved Solids (TDS) Meter
Possibilities for Locally Fabricated Hydraulic Ram PumpsAnnie Thompson
This document provides information and diagrams about locally fabricated hydraulic ram pumps. It discusses the basic parts and principles of how ram pumps work, including the drive head, delivery head, impulse valve, delivery valve, and air vessel. It also provides tips on construction, such as using galvanized pipe for the drive pipe, making flapper-style delivery valves, and drilling snifter holes to replenish air in the system. Maintenance considerations like cleaning out sediment buildup over time are also covered.
This lab report examines how water temperature affects the rate of diffusion. The student hypothesized that a higher water temperature would increase the rate of diffusion. Experimental results showed that diffusion occurred much faster in hot water compared to normal and cold water. For example, in one trial diffusion was completed in 186 seconds for hot water but took 600 seconds for normal water and 743 seconds for cold water. However, the student noted inconsistencies between trials that could be addressed in future experiments by standardizing testing conditions. Overall, the lab supported the hypothesis and provided insight into how temperature impacts diffusion, which is important for understanding cellular processes.
Biology formal lab report on osmosis and diffusionShelby Lazorka
This document describes an experiment on osmosis. Dialysis bags containing different concentrations of sucrose solution (20%, 40%, 60%) and water were placed in beakers of water or 40% sucrose solution. The bags were weighed every 10 minutes over 80 minutes. Results showed the rate of osmosis was greater when the concentration difference between the bag and beaker was higher. The 60% sucrose bag gained the most weight due to the largest concentration gradient. Improving the measurement of bag and clamp weight could increase the experiment's accuracy.
This document provides instructions for operating and maintaining a high speed separator. It begins with safety instructions, emphasizing that the separator contains rapidly rotating parts that can cause serious injury if not properly handled. It then provides an overview of separator components and functions, including separating materials by centrifugal force. The bulk of the document contains maintenance procedures like periodic checks, part replacements, and disassembly/reassembly instructions. It aims to ensure safe and effective operation of the separator.
Gaviotas Hyidraulic Ram Pump: Installation, Operation and Maintenance ManualFatin62c
The document provides installation, operation and maintenance instructions for the Gaviotas Hydraulic Ram pump. It describes the pump's parts and functioning, requiring only a 1-4 meter waterfall of water to pump water long distances without electricity. Installation requires a minimum available flow of 40 liters per minute. Common maintenance issues addressed are an obstructed air vent causing no air in the chamber, and a worn high pressure sealing in the unloading valve.
The Glockemann Ram Pump: Site and Installation GuideFifi62z
The document provides guidelines for installing a Glockemann pump, including selecting a site with a water source that has a minimum flow rate of 1 liter/second and drop of half a meter, measuring the flow rate, drop, and delivery head to select the proper pump model, and instructions for constructing a weir or utilizing natural drops and installing the drive tube and pump securely.
Hydraulic Ram Pump: Consumers guide - Delft University of TechnologyFatin62c
This document provides a guide for consumers on hydraulic rams for water supply. It discusses appropriate water supply options and explains that hydraulic rams can provide water supply in areas with sufficient water flow and elevation change. The document describes the components and basic requirements of a hydraulic ram system, including adequate water source flow, supply head, and delivery head. It also covers site selection factors and installation/maintenance considerations. Appendices provide additional details on hydraulic ram operation, testing results, examples, manufacturer addresses.
The Basic’s of Hydraulic Ram Pumps - Rain Tree FoundationFifi62z
The document provides information about hydraulic ram pumps, including their history, parts, operation, and site installation considerations. It discusses how Joseph Michel Montgolfier invented the first self-acting ram pump in 1796. Over time, hundreds of ram pump designs were manufactured worldwide. The document outlines the basic parts of a ram pump and how they operate using diagrams. It stresses the importance of properly surveying a site to choose the right ram pump model and configuration based on factors like available water source and needed delivery height.
This document provides guidance on surveying, designing, and installing hydraulic ram pumps in Nepal. Key steps in the process include measuring the vertical fall from the water source to the pump site, the vertical lift from the pump to the delivery point, and the available water flow. These measurements are used to calculate the expected water output and size the pump appropriately. The document also discusses intake design, drivepipe and delivery pipe installation, and incorporating hydraulic rams into existing gravity flow water systems. The overall aim is to provide villagers with a simple, low-maintenance water pumping solution that can improve lives by reducing water collection times.
A hydraulic ram, or hydram, is a cyclic water pump powered by hydropower. It takes in water at one "hydraulic head" (pressure) and flow rate, and outputs water at a higher hydraulic head and lower flow rate. The device uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started. The hydraulic ram is sometimes used in remote areas, where there is both a source of low-head hydropower and a need for pumping water to a destination higher in elevation than the source. In this situation, the ram is often useful, since it requires no outside source of power other than the kinetic energy of flowing water.
A hydraulic ram is a cyclic water pump powered by hydropower that takes in water at one pressure and flow rate and outputs it at a higher pressure but lower flow rate. It has no external energy input and can operate continuously. The components of one hydraulic ram project included a drive pipe, two check valves, an air chamber bottle, a delivery pipe, a source tank, and connectors. It was able to lift water 14 feet using a source height of only 2.75 feet, with an estimated cost of 1000-1200 taka. Hydraulic rams have benefits of using renewable energy at low cost but are limited to hilly areas and have low volumetric efficiency.
This document discusses the design of a hydraulic ram pump to transfer water from a river into a water tank 20 meters high. It begins with an abstract and objectives stating the goal is to design a hydraulic ram pump that can fill a 1200 cubic meter water tank from a river with a flow rate of 120 cubic meters per second. It then reviews the literature on hydraulic ram pumps, discussing their history, working principles, and advantages for developing areas without access to electricity. The document explains that a hydraulic ram pump uses the kinetic energy of flowing water to pump a smaller volume of water to a higher elevation, with only two moving parts. It aims to design a suitable ram pump for the given conditions and river water source.
Home Made Hydraulic Ram Pump - Part 1
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Huerto Ecológico, Tecnologías Sostenibles, Agricultura Organica
http://scribd.com/doc/239850233
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
This document summarizes a student project report on a hydraulic ram pump. It includes sections on the acknowledgements, introduction, working principle, applications and limitations, design considerations, and conclusions. The project was guided by lecturers from the mechanical engineering department and aimed to study how hydraulic ram pumps can be used to pump water from streams or springs to higher elevations in a simple and reliable way using renewable energy. The summary highlights the key components and working cycle of ram pumps in lifting a small amount of water a great height using the energy of a larger falling water flow.
The document discusses two options for developing the Tentalum oil field:
1. Export the oil via a 50km offshore pipeline and 500km onshore pipeline to an existing onshore facility. A fixed piled structure is recommended to process the oil offshore before export via pipeline.
2. Blend the Tentalum oil with the existing production from the nearby Palladium Platform. This option would be initially cheaper but may not be as financially beneficial long-term.
The document recommends the first option of building an offshore structure and exporting via pipeline, as relying solely on the Palladium Platform seems risky without additional infrastructure.
Ram Pump - Installation Manual
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Huerto Ecológico, Tecnologías Sostenibles, Agricultura Organica
http://scribd.com/doc/239850233
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
The document discusses the hydraulic ram pump, which uses the energy of flowing water to pump a small amount of water to a higher elevation without external power. It provides a brief history of the technology and its inventors. The key parts and types of ram pumps are identified. Common operational problems and solutions are outlined. Advantages include being powered solely by water flow, having few moving parts, and providing continual operation. Disadvantages include only pumping a small portion of water and potential sediment issues.
Theory and Application of Hydraulic Ram Pumps (Hydrams) - S HazarikaFifi62z
The document discusses hydraulic ram pumps (hydrams), which use the potential energy of falling water to lift a small portion of water to a greater height. Hydrams are simple, reliable, and require minimal maintenance, making them suitable for rural water supply and irrigation where other power sources are not available. The document describes the components and design of hydram systems, including intake, drive pipe, ram, supply line, and storage tank. It provides equations and tables to design hydram systems based on water supply, fall height, lift height, and desired water delivery. The document also discusses applications and limitations of hydrams.
Nesh Mucibabic led the design of a 36 MGD Rock Creek Excess Flow Pump Station and two 5 MG holding basins to temporarily divert peak sanitary flows from a 54-inch interceptor and release the stored flows in a controlled manner. The diversion deferred needed capacity upgrades to the Rock Creek Water Treatment Plant. Nesh designed the dry well/wet well pump station with five submersible pumps, self-cleaning wet well, wet well drain pump, diversion and flow control structures, force main, overflow lines, and diversion valves. He was also responsible for the diversion system hydrology and hydraulic calculations and operation. The city thanked Nesh for his leadership, diligence, and thoroughness on the
Home Built Hydraulic Ram Pumps - NW Independent Power ResourcesFatin62c
This document provides instructions for building two types of homemade hydraulic ram pumps (HRP1-1 and HRP2-2) that can pump water without electricity. It explains how hydraulic ram pumps work by using the kinetic energy of flowing water to lift a portion of the water to a higher storage tank. The document gives details on selecting a water source, installing intake and drive pipes, constructing valves and pressure chambers, and provides illustrations of the pump's operating sequence. Proper setup and maintenance are emphasized to maximize the pump's efficiency and longevity.
This document provides instructions for building a homemade hydraulic ram pump. It includes a list of parts needed to construct a 1-1/4 inch pump, diagrams labeling the parts, and descriptions of how each component works and connects together. Performance expectations are provided in tables, including expected water output rates based on input rates and installation specifications. Test data from a sample 1-1/4 inch pump installation is shown to output around 0.33 gallons per minute with a shutoff head of 22 psi and operating head of 10 psi.
Method Statement for Powerflushing Domestic SystemsFernox
This method statement has been written as a guide for cleaning of existing domestic central heating systems using a Fernox Powerflow Flushing unit in conjunction with Fernox cleaning products. System cleanliness is checked using a Fernox Total Dissolved Solids (TDS) Meter
Possibilities for Locally Fabricated Hydraulic Ram PumpsAnnie Thompson
This document provides information and diagrams about locally fabricated hydraulic ram pumps. It discusses the basic parts and principles of how ram pumps work, including the drive head, delivery head, impulse valve, delivery valve, and air vessel. It also provides tips on construction, such as using galvanized pipe for the drive pipe, making flapper-style delivery valves, and drilling snifter holes to replenish air in the system. Maintenance considerations like cleaning out sediment buildup over time are also covered.
This lab report examines how water temperature affects the rate of diffusion. The student hypothesized that a higher water temperature would increase the rate of diffusion. Experimental results showed that diffusion occurred much faster in hot water compared to normal and cold water. For example, in one trial diffusion was completed in 186 seconds for hot water but took 600 seconds for normal water and 743 seconds for cold water. However, the student noted inconsistencies between trials that could be addressed in future experiments by standardizing testing conditions. Overall, the lab supported the hypothesis and provided insight into how temperature impacts diffusion, which is important for understanding cellular processes.
Biology formal lab report on osmosis and diffusionShelby Lazorka
This document describes an experiment on osmosis. Dialysis bags containing different concentrations of sucrose solution (20%, 40%, 60%) and water were placed in beakers of water or 40% sucrose solution. The bags were weighed every 10 minutes over 80 minutes. Results showed the rate of osmosis was greater when the concentration difference between the bag and beaker was higher. The 60% sucrose bag gained the most weight due to the largest concentration gradient. Improving the measurement of bag and clamp weight could increase the experiment's accuracy.
Flowsheet development in the context of copper extractionSargon Lovkis
This document discusses flowsheet development for copper extraction. It provides information on various processing methods including smelting, pressure oxidation, bioleaching, heap leaching, solvent extraction, and electrowinning. It also addresses topics like mineralogy, comminution, investor concerns, and cost estimation. The document is a presentation on flowsheet development best practices with a focus on processing chalcocite ore that may contain associated gold.
The document provides details about the execution of a copper plant project in India. Key points:
1) The Birla group commissioned consultants to prepare a feasibility study and select a site for a new integrated copper plant in India. Dahej, Gujarat was selected as the site.
2) Outokumpu flash smelting technology was selected for the copper smelter and Southwire for the continuous cast copper rod plant.
3) Measures to fast track the rod plant included separate engineering, procurement, and construction packages for certain units and staggered equipment supply.
4) Commissioning of the rod plant was completed ahead of schedule in March 1997 compared to the original target of September 1997.
Froth Flotation_1 presentation includes flotation fundamentals, performance calculation, hydrophobicity or hydrophilicity, and also particle or bubble contact. Next, Front Flotation_2 will brightly discuss about collection in the froth layer, reagents and flotation's equipment.
This document summarizes a student's research project on parameters that affect mineral flotation recovery. It discusses the flotation mechanism, important reagents like collectors and frothers, and effective operational and hydrodynamic parameters. Key parameters identified as influencing recovery include solid percentage, pH, collector type, number of flotation cells, impeller speed, and impeller clearance from the bottom of the cell. The project aims to enhance mineral recovery through optimization of these flotation process factors.
Presented by METS Consulting Metallurgist, this presentation covers flotation history, reagents, equipment and circuit configuration. The requirements of metallurgical testwork programs will be discussed, for ores requiring flotation processing techniques for extraction of minerals
The document provides an overview of froth flotation, including its history, basic principles, mechanics, chemicals involved, and engineering aspects. Froth flotation is a process that separates minerals by taking advantage of their different hydrophobic properties. It involves making the valuable minerals hydrophobic so they can attach to air bubbles and float, while the gangue minerals sink. Key chemicals used include collectors to modify mineral surfaces, frothers to stabilize bubbles, and regulators like activators, depressants, and pH modifiers.
Froth flotation is a process for separating minerals based on their ability to adhere to air bubbles in water. Hydrophobic mineral particles attach to bubbles and are carried to the surface, while hydrophilic particles remain in the water. The process involves many interrelated factors including reagents, equipment design, and operational parameters. Collectors are chemicals that render mineral surfaces hydrophobic, allowing bubbles to attach. Proper particle-bubble contact and stable froth layers are also required for effective mineral separation by froth flotation.
This document summarizes research on the synthesis of copper nanoparticles through chemical reduction. A variety of copper salts, reducing agents, ligands, and solvents were tested. While color changes indicated reduction occurred in some experiments, UV-Vis analysis did not find evidence of copper nanoparticle formation due to degradation. The most promising results used copper(II) gluconate reduced by Surfonamine-L-100 in propylene carbonate, showing an absorbance peak that could represent large copper nanoparticles. Further optimization of parameters is needed to produce stable copper nanoparticles that can be characterized.
This document provides an overview of froth flotation, which is a process for separating minerals and coal by taking advantage of differences in the surfaces of materials. It works by making some materials hydrophobic so they can attach to air bubbles. There are two main types of flotation: direct and reverse. The key factors that determine whether a material will float include its wettability and the chemistry involved through collectors, frothers, and other reagents. Proper equipment and control of operation parameters like feed rate and pH are also important for effective flotation. Challenges include particle properties and achieving high selectivity in separating target from waste materials.
This document discusses froth flotation, a process used to selectively separate minerals. Froth flotation works by rendering the surface of valuable minerals hydrophobic so they can attach to air bubbles. The bubbles carry the hydrophobic minerals to the surface, where they can be removed from waste rock. The key steps are liberation of the minerals, making them hydrophobic using collectors, promoting bubble formation with frothers, and modifying the process using activators, depressants or pH modifiers. Collectors attach to mineral surfaces to make them hydrophobic, while frothers stabilize bubbles for attachment. Together these allow selective separation based on a mineral's natural surface properties.
Leaching process (solid-liquid extraction)Asim Farooq
This document defines and provides examples of the leaching process. Leaching involves extracting a substance from a solid material by contact with a liquid. A simple example given is making green tea, where steeping a green tea bag in hot water extracts the green flavor from the solid bag into the liquid water. The principle of leaching is that it can be done in batches, semi-batches, or continuously at an elevated temperature to increase solubility. Common uses of leaching include extracting minerals from ores in the metals industry, sugar from beets in the sugar industry, and oil from seeds in the oilseeds industry.
Flotation is a process used to separate minerals from gangue by making some particles hydrophobic and causing them to attach to air bubbles. This summary provides a brief overview of the history, basic principles, mechanics, chemicals, and advantages/disadvantages of the froth flotation process. Key aspects include: comminution to increase surface area, use of collectors to render desired minerals hydrophobic, addition of frothers to create stable bubbles, separation of floated minerals from gangue in the froth, and use of activators, depressants, and pH modifiers to control selectivity. Flotation is widely used in the minerals industry for extracting base metals like lead, zinc, and copper.
This document discusses copper and copper alloys, including their properties, extraction, production, uses, and applications. It covers the physical properties of copper, its major ores, and worldwide production levels. Extraction techniques for copper from sulfide and oxide ores are described, involving processes like froth flotation, roasting, smelting, and electrolytic refining. Key copper alloys like brasses, bronzes, cupronickels, and nickel silvers are classified and their phase diagrams discussed. Major applications of copper and its alloys span building construction, pressure vessels, marine uses, and more.
Process flow chart 6 stages powerpoint templates 0712SlideTeam.net
The document contains instructions for a 6 stage process flow chart template. It includes text boxes for each stage, directional arrows between stages, and the option to download the editable template. The template can be customized by editing text in each box, changing colors and sizes of shapes, and ungrouping objects to edit individually.
The document provides an overview of copper, including its history of use dating back to 5000 BC, its excellent properties as an electrical and thermal conductor, and its many applications in manufacturing and construction due to its workability and corrosion resistance when alloyed with other metals like zinc, tin, aluminum, and silicon. Common alloys of copper include brasses, bronzes, copper-nickels, and high copper alloys that are used in applications like wiring, plumbing, bearings, and more.
Production, Manufacturing and Extraction of Silver, Gold, Copper, Magnesium,...Ajjay Kumar Gupta
Electroplating involves passing an electric current through a solution called an electrolyte. This is done by dipping two terminals called electrodes into the electrolyte and connecting them into a circuit with a battery or other power supply. The electrodes and electrolyte are made from carefully chosen elements or compounds. When the electricity flows through the circuit they make, the electrolyte splits up and some of the metal atoms it contains are deposited in a thin layer on top of one of the electrodes—it becomes electroplated. All kinds of metals can be plated in this way, including gold, silver, tin, zinc, copper, cadmium, chromium, nickel, platinum, and lead.
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Application of Zinc Refining Process, Book of Non-Ferrous Metal, Book on Non-Ferrous and Precious Metals with Electroplating Chemicals, Chemical Extraction of Precious Metals, Chemicals are used for the preparation of precious metal plating, Chromium Chemistry, Chromium occurrence, principles of extraction, Chromium uses, Copper extraction and purification, Copper extraction techniques, Copper refining process, Electrolysis of Magnesium Chloride, Electrolysis Production of Magnesium, Electrolytic processes for the extraction of nickel, Electroplating Chemicals & Non Ferrous Metals, Electroplating Chemicals, Essential Guide to Investing in Precious Metals, Extracting Lead Materials from Ore, Extracting precious metals from electronics, Extraction of Copper, Extraction of Lead, Extraction of nickel from its ore, Extraction of nickel from sulphide ore, Extraction of Nonferrous Metals book, Extraction of nonferrous metals, Extraction of Platinum Group Metals, Extraction of precious metals, Extraction of zinc by electrolysis, Extraction of Zinc, Gold Extraction in India, How electroplating works, How is lead processed?, How is nickel extracted?, How lead is made - material, used, processing, product, industry, How Nickel is produced, How to remove precious metals, How to start Non-ferrous Businesses, How to start Precious Metals Businesses, How to start your own Precious Metals Business, Indian Non-Ferrous Metals Industry, Lead Essential Chemical Industry, Lead processing, Lead smelting, producing and classification, Lead uses, Magnesium electrolysis process, Magnesium Essential Chemical Industry, Magnesium Production in India, Method used to extract nickel, Nickel electroplating, Nickel processing, Nickel smelting process, Nickel uses, Nickel, non ferrous extractive metallurgy book, non ferrous metal Business Line, non ferrous metal business, non ferrous metals, Non-ferrous and Precious Metals Businesses, Non-Ferrous and Precious Metals Mining Projects, Nonferrous Metal Processing Business Unit, Non-Ferrous Metal Scrap Business, Non-ferrous metals Aluminium, Non-Ferrous Metals and their Uses,
This document describes an experiment investigating how the concentration of sucrose solutions affects the rate of osmosis in potato cylinders. Potato cylinders were placed in solutions of varying sucrose concentration (0%, 10%, 30%, 50%, 70%) and their change in mass over 30 minutes was measured. The results showed that as the concentration of sucrose increased, the potato cylinders lost more mass, indicating the rate of osmosis increased. This supported the hypothesis that increasing the concentration difference between the solution and potato would increase the rate of water moving from the potato into the solution.
This document provides information about an internship at Varun Beverages Limited, including:
- The intern's name, educational details, and period of internship from June 1-July 1, 2015.
- An overview of the types of water used (raw water and treated water), the water treatment process, and analysis of water quality parameters and wastage.
- Details of the multi-step water treatment plant and processes involved (sand filtration, carbon filtration, reverse osmosis, etc.).
- Distribution and uses of treated water throughout the beverage plant, including various production lines.
The document provides information about a thermal power plant and its various components. It discusses the coal handling plant, water treatment plant, boiler, steam turbine, condenser, ash handling plant and other key parts. It provides specifications for the boiler (60/170 TPH capacity), steam turbine (27/38.5 MW rating), and condenser. It also includes diagrams of the coal handling process, water treatment process and ash handling system to transport fly ash from the electrostatic precipitator to the silo.
This document provides details on the design and process of an effluent treatment plant (ETP) at Rourkela Steel Plant. The ETP uses coagulants, flocculants and pH adjusters to treat wastewater from the gas cleaning plant. Key components of the ETP include flash mixers for chemical treatment, thickeners to separate solids from water, sludge tanks for sludge storage, and a filter press to dewater the sludge. The ETP is designed to meet performance standards for treated water quality and sludge moisture content.
This experiment studied the effect of step change input on the concentration in a continuous stirred tank reactor (CSTR) system consisting of three reactors in series. Sodium chloride solution was introduced to the first reactor and deionized water was pumped through the system. Conductivity readings were taken from each reactor every 3 minutes. The results showed that the conductivity increased over time as the salt solution spread through the reactors. After 84 minutes, the conductivity values equalized across the three reactors, indicating the input had achieved steady state distribution. Issues with data recording affected the smoothness of the plotted results graph.
HPL Report on Pumps in IOP by Subham Shit [Final]Subham Shit
This document provides a summary of the Integrated Offsite and Utilities Plant (IOP) at Haldia Petrochemicals Limited. It describes three main controlling units within IOP - the North, East, and South Control Rooms. The North Control Room oversees systems like cooling water, water treatment, DM water production, compressed air, and naphtha storage. The East Control Room manages material loading/unloading, storage of tanks, spheres and bullets. The South Control Room controls the waste water treatment plant and flare system. Chapter 2 then discusses various types of pumps used in IOP, including their classification, cavitation, NPSH, components, and performance curves.
HPL Report on Pumps in IOP by Subham ShitSubham Shît
This document provides an overview of the Integrated Offsite and Utilities Plant (IOP) at Haldia Petrochemicals Limited. It describes the key systems and operations within the three main controlling areas of IOP - North Control Room (NCR), East Control Room (ECR), and South Control Room (SCR). NCR oversees cooling water systems, water treatment systems, DM water production, compressed air, and naphtha storage. ECR covers gantry loading/unloading of tanks, storage of materials, and motor spirit production. SCR manages the waste water treatment plant and flare system. The document also includes diagrams of these various IOP systems.
The document provides details about the internship of Ashutosh Khushu at NIRMA LTD plant located in Bhavnagar, India. It discusses the various sections of the soda ash plant including brine preparation and purification, production of lime and gas cleaning, lime grinding and ammonia recovery, carbonation, and filtration and calcination. The internship helped Ashutosh gain practical experience and apply his theoretical knowledge to better understand how a real soda ash production system works.
This document summarizes a case study evaluating the performance of the water treatment plant in Yavatmal, India. The plant treats water from the Chapdoh Dam and has a capacity of 17.40 MLD. Testing was conducted on water samples from the intake, flash mixer, clariflocculator, filters, and clear well to analyze removal of parameters like turbidity, alkalinity and hardness. Turbidity was reduced from an average of 2.5-447 NTU in raw water to 0.3-9.7 NTU after treatment. Alkalinity reduced from 65-120 mg/L to 20-95 mg/L. The study found the plant largely met standards and was effective
The treatment process has three stages: pre-treatment, ultrafiltration, and reverse osmosis. Pre-treatment involves clarification, dual media filtration, and basket strainers. Ultrafiltration removes remaining contaminants using membrane filtration. Reverse osmosis further polishes the water. Additional processes include degasification, mixed bed exchange for pH control, sludge handling via centrifuge, and chemical dosing for treatment.
This document provides an overview of the effluent treatment plant (ETP) at Rourkela Steel Plant. The ETP treats wastewater from the Gas Cleaning Plant and recycles it for further use. It describes the key components of the ETP including flash mixers that add chemicals to coagulate solids, clarifiers that separate treated slurry from clean water, sludge tanks that hold sludge for 8 hours, and a filter press that dewaters sludge to less than 20% moisture using recessed plate filters and high pressure. The overall purpose of the ETP is to clean the wastewater, remove suspended solids and heavy metals, and recycle the treated water to reduce costs and conserve
The document provides details from an internship report at New Mangalore Port Authority. It discusses the company, engineering departments, tendering process, sewage treatment plant, railway transport system, and lessons learned. Key points include:
1) New Mangalore port is located on India's west coast and managed by New Mangalore port trust since 1980.
2) Engineering departments include civil and mechanical, with civil responsible for construction, maintenance, dredging, and water supply.
3) The tendering process has stages for pre-tender, advertisement, opening/closing bids, and evaluation.
4) The sewage treatment plant uses various tanks and filters to treat sewage in a multi-step process
The document describes the effluent treatment plant (ETP) at Rourkela Steel Plant. The ETP treats wastewater from the Gas Cleaning Plant and recycles it for further use. The wastewater contains high levels of suspended solids that are removed through a multi-step process involving flash mixing with coagulants, settling in clarifiers, dewatering using a filter press, and recycling of treated water. The ETP is designed to treat 1140 cubic meters of wastewater per hour to reduce costs and conserve water resources.
The document provides information about the Talwandi Sabo Power Limited (TSPL) coal-fired power plant in Mansa District, Punjab, India. Some key points:
- TSPL is implementing a state-of-the-art 3 x 660 MW supercritical thermal power plant, which will be the largest greenfield power project in Punjab.
- The plant will help meet Punjab's growing power demand, as current installed capacity is less than peak demand.
- The plant receives coal via rail from Coal India subsidiaries and water from the Jagga canal. It has a coal handling plant, boiler, turbine generator sets, water treatment systems and other auxiliary equipment.
- The boiler is
The document provides information about the Talwandi Sabo Power Limited (TSPL) coal-fired power plant in Mansa District, Punjab, India. Some key points:
1) TSPL is implementing a state-of-the-art, supercritical, 3 x 660 MW coal-based thermal power plant, which will be the largest private sector power project in Punjab.
2) The plant will help meet Punjab's growing power demand, which has exceeded supply in recent years. Coal for the plant will be supplied by subsidiaries of Coal India Limited.
3) The plant's main components include tangentially-fired boilers, steam turbines from Dongfang Electric, water treatment systems,
North East Water (NEW) hired Amiad to design and install two 3.5 million liters per day (MLD) bore water treatment plants in Wangaratta, Australia to address high levels of iron, manganese, and arsenic in the water supply. Amiad designed, manufactured, and delivered two containerized treatment systems, each consisting of four media vessels. The treatment plants were able to remove contaminants and produce water meeting Australian drinking water standards, ensuring a safe potable water supply for the town.
The plant water system treats raw water in multiple stages to remove impurities before supplying it to the boiler. The raw water contains suspended particles and dissolved ions that can damage boiler tubes. It is treated by removing suspended particles, chlorine, cations using a cation exchanger, carbon dioxide using a degasifying tower, and anions using an anion exchanger. Finally, a mixed bed removes any remaining ions before water is stored and supplied to the plant. The electrical system steps down voltages from 11kV to lower voltages to power the water treatment equipment.
Micro-hydro power is a type of hydroelectric power that typically produces up to 100 kW of electricity using the natural flow of water. These power plants can provide power to an isolated home or small community. They use various components like an intake, penstock, turbine, and generator to harness the kinetic energy of flowing water. Different types of turbines are used depending on the head and flow available, including impulse turbines like the Pelton wheel for high head, and reaction turbines like the Francis turbine for medium head. Micro-hydro systems complement solar energy installations in areas where water flow is highest when solar energy is lowest.
(Keshav) report file on kali sindh thermal power project, jhalawarKeshav Meena
This document provides an introduction and overview of the Kali Sindh Thermal Power Project (KSTPP) located in Jhalawar City, India. It discusses the key factors that make the site suitable for a power plant, including access to water from the Kali Sindh river, proximity to a railway station and transmission lines, and available land for ash disposal. The KSTPP currently has 2 units generating 1200 MW of power, with plans for 2 additional 660 MW units. The document then goes on to describe the general layout and basic systems of the plant, including the fuel, air/gas, feedwater/steam, and cooling water circuits. It provides details on the coal handling plant, including unloading
To move or recirculate saltwater for various uses, there is the seawater pump. The water-cooling system can benefit from the sea water pump by recirculating seawater throughout the equipment.
Similar to Report on Leaching Washing and Solvent Extraction Sections (20)
3. [Type text]
Nomenclature
CCD: Counter Current Decantation
CPLT: Current Pre-Leach Thickener
gpl: Grams per liter
HPLS: High Pregnant Liquor Solution
LPLS: Low Pregnant Liquor Solution
MV: Mixing Vessel
O/A: Organic to Aqueous ratio
O/F: Overflow
PD: Phase Disengagement
RPLT: Reclaim Pre-Leach Thickener
SX: Solvent Extraction
TD: Tailings Dam
U/F: Underflow
List of Figures
Figure 1: Leaching section process flow sheet……………………………………….8
Figure 2: Washing section process flow sheet……………………………………….11
Figure 3: Solvent extraction section process flow sheet……………………………..15
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4. [Type text]
1.0 INTRODUCTION
The ore mined at Nchanga underground and open pits contain copper in form of sulphides
and oxides. The sulphides are recovered by the flotation concentration process in form of
concentrates which are treated via pyro metallurgy route to produce copper cathodes. The
copper in oxide form report to the tailings which are supposed to be discarded but since they
contain the oxide copper minerals in recoverable quantities, a different route to recover this
copper in oxide form becomes necessary. The Tailings Leach Plant was established for this
purpose to treat oxide copper minerals present in the tailings via a hydrometallurgy route.
This is achieved by dissolving the oxide copper in the tailings using concentrated sulphuric
acid, separating the dissolved copper in solution from the barren solids and then purifying
and concentrating the solution by using the solvent extraction process and finally recovering
the copper in solution by electro winning to produce copper cathodes as the final product.
The Tailings Leach Plant treat tailings from the Nchanga concentrators (Old East Mill, New
West Mill and New East Mill) and old tailings damps (Currently TD3). The old tailings
damps contain recoverable acid soluble copper which were damped at the time when the
processing of low grade tailings was not feasible at Nchanga.
The plant is comprised of seven sections; Leaching, Washing, Muntimpa tailings pump
station /Post leach agitator area, Lime plant, Dams, Solvent Extraction and Tank Houses.
This report details the operations in the leaching, washing and solvent extraction sections.
2.0 LEACHING SECTION
This is the section which receives feed for treatment at the Tailings Leach plant and the
whole copper recovery process starts here. The leaching section is comprised of the Current
Pre-Leach Thickener (CPLT), Reclaim Pre-Leach Thickener (RPLT), Kamana Water
Reticulation Pump Station, Pre-Leach Agitators and Leach Pachucas. The main purpose of
this section is to dissolve out the acid soluble copper present in the feed (Tailings) by using
concentrated sulphuric acid.
Tailings from the Nchanga concentrators (current tails) and those from reclamation dams
(reclaim tails) are fed in the two thickeners i.e CPLT and RPLT with the addition of
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5. [Type text]
flocculants which help in the settling of fine solid particles. The design was that reclaim tails
be fed to RPLT and current tails to CPLT but currently the two types of tails are blended for
better settling rates (reclaim tailings are relatively courser than the current tailings). Current
tails are delivered via four lines i.e south, center, north and new east mill tails lines while
reclaim tails come through three lines i.e line 1, 2 and 3. The three reclaim tails lines are run
two at a time while reserving one line on standby.
Before leaching, the water in the tailings is reduced by use of conventional thickeners to
produce underflow slurry with less water and overflow water recycled for plant use.
2.1 Pre-Leach Thickeners
There are two pre-leach thickeners, RPLT and CPLT. RPLT was designed to treat reclaim
tails from old tailings dams while CPLT was designed to treat current tails from the Nchanga
concentrators but currently the tailings are blended i.e. reclaim and current tails are treated
together both at RPLT and CPLT. And in cases where CPLT is down some tails are diverted
to RPLT and vice versa while others are shut down so that the operating thickener is not over
burdened. The two thickeners are each equipped with three underflow pumps. Two pumps
are run at any one time at RPLT while one is run at any one time at CPLT. The rest of the
pumps are on standby.
The pre-leach thickeners serve the purpose of reducing the water content in feed before
leaching takes place to minimize the consumption of acid and also minimize the amount of
raffinate generated and reduce the amount of raffinate for bleeding.
The tails fed to the two thickeners come at densities in the range 1100 – 1300 kg/m3
(14 –
36% solids) and after removing water the underflow densities are increased to the range 1550
– 1650 Kg/M3
(56 – 62% solids).
During the thickening process two products are obtained overflow water and underflow
slurry. Overflow water is recycled for plant use. RPLT overflow water is mainly used for
tailings reclamation at TD3 and CPLT used mainly for hosing, gland water for slurry pumps
and muntimpa line flushing.
Important Parameters to Monitor and Control on the Thickeners
Torque: the thickener rake torque measure the resistance of the rakes to
rotation. A high torque means high resistance to rotation and a torque in
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6. [Type text]
excess of 45 percent stops the rakes. When the rakes stop it means going
down on the thickener, hosing out all the solids and then start over which is
costly, time consuming and a loss on production. Therefore, the rake torque is
always monitored so that it does not exceed 10 percent.
Underflow density: underflow densities must be maintained between 1550
and 1650 Kg/M3
which is the desired normal operating density required for
cost optimum water removal. This is monitored by way of controlling the
underflow pulling rates. If the density falls below 1550 Kg/M3
the pulling rate
is reduced to build up the densities and vice versa if the densities go beyond
1650 Kg/M3
.
Flocculent dosage: flocculation affects the settling rate of finer particles in
the thickener and hence the overflow clarity. It is desired that a clear overflow
is obtained at all times. Dosing the right amount is very important. Under
flocculation for example is very dangerous as it can cause a shooting torque
(sudden rise in torque) and stop the thickener rakes from running at once.
MV Density: the mixing vessel densities must be maintained in the range
1150 - 1250 Kg/M3
to prevent hindered settling at the feed well and obtain
good settling rates and hence clear overflow water and normal rake torque.
This is achieved by adding dilution water in the mixing vessel.
2.2 Kamana Water Reticulation Pump Station
Kamana water reticulation pump station is there to supply water for use in the plant for
hosing, gland water, muntimpa line flushing and dilutions where required. The source of
water is either CPLT overflow launder or reservoir 150’ (Note: Water is drawn from reservoir
150’ only if the launder level at CPLT is very low or CPLT is down).
The pump station is equipped with six pumps, three to supply high pressure and the other
three to supply low pressure water. Pumps 277/231, 235 and 234 supply high pressure and
pumps 277/232, 229 and 228 low pressure water. High pressure pumps supply water in the
plant for hosing and dilutions while low pressure pumps supply water to gland water pump
station for use with slurry pumps at CPLT, RPLT, CCDs and Muntipa pumps. It is important
to keep overflow water as clear as possible to prevent the supply of dirty water which has
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7. [Type text]
negative effects on plant operations. If the overflow clarity at CPLT becomes very bad, a
bloke valve is closed to stop water in the launder from going to kamana. And in that case a
bloke valve is opened in kamana to start drawing water from reservoir 150’. During this time
transfer of water to RPLT using pumps 273/198 and 199 are also stopped until the conditions
are normalized.
2.3 Pre-Leach Agitators
There are two pre-leach agitators north and south which act as feed buffer before RPLT and
CPLT underflow are fed to the leach pachucas. At the agitators are seven slurry pumps 102,
103, 105, 135, 136, 137 and 138 which feed material into leach Pachucas. Pumps 103, 105
and 135feed A-bank, 102, 136 and 138feed B-bank and C-bank is fed by pumps102 and 137.
The pumps run one at a time to each bank allowing at least one pump on standby in case the
running pump fails.
2.4 Leach Pachucas
A Pachuca is an air agitated cylindrical leaching vessel with a conical bottom. Air is injected
at the bottom of the vessel for agitation and then slurry, acid and raffinate are fed on top.
Raffinate is added to break the densities coming from the pre-leach thickeners for easy
operations of pachucas and CCDs (see discussion on lowering densities. There are four banks
of pachucas A, B, C and D. These banks have four pachucas each except for D bank which
has three. Banks A, B and C has two receiving and two discharging pachucas labeled 1 – 4 i.e
1A – 4A, 1B – 4B and 1C – 4C. 1 and 2 are receiving pachucas while 3 and 4 are discharging
pachucas. Currently only A, B and C banks are operational D bank is under rehabilitation.
For A and B banks, 3A discharges to CCD2 while 4A discharges to CCD3. The design was
that all the two can discharge to either CCD2 or CCD3 but some lines have been spaded. So
when discharging to CCD2 (normal operation) and running on 4 pachucas the configuration
is 1-2-4-3 out. The configuration will depend on the pachucas available and the receiving
thickener at the CCDs. Bank C operates normally both 3C and 4C can discharge to either
CCD2 or CCD3.
Important Parameters to Control
The parameters controlled at leach pachucas are pH, agitation air pressure, residence
time and Pachuca density.
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8. [Type text]
pH: This affects the leaching efficiency. High pH above the set point will lower
the leach efficiency and low pH below the set point will increase free acid tenor in
the PLS at CCDs and hence lower extraction efficiency at solvent extraction plant
and also a waste of acid and an increase in the cost but with no significant change
on the leach efficiency. The pH set point is 1.8 – 2.2.
Agitation air pressure: This will lower the leach efficiency if lower than is
required as there will be poor mixing and contact between acid and copper
minerals in the feed. It is therefore important that there is good agitation in the
pachucas at all times. Poor agitation also cause blockage of interconnection lines.
The minimum agitation pressure is 3 bars.
Pachuca density: When Pachuca densities are higher than 1250 Kg/M3
settling is
affected at the receiving CCD thickener causing increased total suspended solids
in PLS which is undesirable and result in more crud generation in solvent
extraction streams. Therefore the Pachuca densities are maintained in the ranges
1150 – 1250 Kg/M3
and this is achieved through the addition of raffinate at the
pachucas.
Residence Time: A low residence time will result in low leach efficiency and
vice versa. Residence time is controlled by adjusting the flows to a receiving
Pachuca i.e raffinate and slurry flow. The residence time is set at 30 minutes for
each Pachuca making two hours per bank when running on four pachucas. Also
the number of pachucas available per bank will affect the residence time. It is
always desired to run on four pachucas to have good residence time and hence
favorable leach efficiency.
Leach efficiency is very important in this section as it the overall objective at the end
of the day to achieve. The projected leach efficiency is currently at 87%. Figure 1
below shows the process flow sheet of the leaching section.
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9. [Type text]
Figure 1: Leaching Section Process FlowSheet
CPLT
RPLT
Reclaim Tails
Current Tails
To Tailings
Reclaimation
O/F
U/F
U/F
Other Plant Use
O/F
To Kamana
N/ S Pre-
Leach
Agitators
TO CCD2/CCD3
Agitation Air
From Compressor
Acid + Raffinate +
Effluent
B -
Bank
A -
Bank
C -
Bank
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10. [Type text]
3.0 WASHING SECTION
The washing section receives feed from the three banks of pachucas (A, B and C banks) to
separate the leached copper in solution from the solids. There are five thickeners in this
section named CCD1-CCD5.The thickeners are arranged in a way that overflow and
underflow flow in opposite direction or counter current hence the name Counter-Current
Decantation (CCD). CCD2 is the receiving thickener while CCD1 is a clarifier to CCD2
overflow and CCD3-CCD5 are wash thickeners. CCD3 overflow is clarified using the
clarifier at solvent extraction section.
The objective of the washing section is to recover solution copper in the thickener overflow
and minimal solution copper loss in CCD5 underflow so that the target wash efficiency of
92% is achieved. Also PLS free acid has to be controlled between 2-3 grams per liter in order
not to affect extraction efficiency at solvent extraction plant.
This section is only comprised of the CCD thickeners and old reagent preparation plant.
3.1 CCD Thickeners
As earlier mentioned, there are five CCD thickeners in operation and each is equipped with
three underflow pumps except for CCD1 which has two. Underflow pumps run two at a time
and keeping one on standby. The underflow pumps discharge into two independent lines.
CCD2 is the receiving thickener during normal operations and CCD1 is the clarifier to CCD2
overflow. The three discharge lines from the leach pachucas are discharged into CCD2 MV
by gravity. CCD2 overflow is pumped to CCD1 using pumps 147, 148 and 149 located at
blue tank behind CCD3 for clarification before sent for solvent extraction as HPLS.CCD2
underflow is pumped as feed to CCD3. Overflow from CCD3 gravitates to clarifier at SX as
LPLS and the underflow is pumped to CCD4 for washing out of the solution copper in
underflow. CCD4 overflow gravitates to CCD3 and the underflow is pumped to CCD5 for a
final wash. Washing is achieved by the addition raffinate to CCD5.Overflow from CCD5
gravitates to CCD4 and the underflow is pumped to Muntimpa for neutralization and
disposal.
The wash liquor (raffinate) addition to CCD5 has to be continuous and is very important such
that if it is not available you can shut down the plant as no washing can take place resulting in
high copper losses.
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3.2 Old Reagent Plant
This is where the reagents used for flocculation in all the thickeners at TLP are prepared.
There are two types of reagents prepared, acid duty for use with CCD thickeners and non-
acid duty for use with CPLT and RPLT. The reagents being used currently are Superfloc
N100 for the acid duty thickeners and Flopam AN 923 for the non-acid duty thickeners. The
acid duty reagents are tailored to operate in an acidic environment while the non-acid duty
reagents operate in a non-acidic environment. When preparing the reagents raffinate is used
for dilution on the acid duty side and water on non-acid duty but on the acid duty if there is
no raffinate water is also used. Reagent mixing is done according to the instructions given to
the operator by the plant metallurgist who make necessary calculations depending on dosage
required in the plant.
There are six pumps at reagent plant, three for acid duty and three for non-acid duty side. On
the acid duty side pumps 163, 165 and 167 are used to transfer flocculent the CCD
thickeners. Only one pump is run at a time. On the non-acid duty side, pumps 172, 173 and
174 are used to transfer flocculent to RPLT and CPLT. During normal operations 173 and
174 are used to transfer reagent to CPLT and RPLT. 172 is used to transfer reagent from east
and west preparation tanks to northeast and northwest storage tanks but it can also be used to
transfer reagent direct to RPLT and CPLT in cases where both pumps 173 and 174 are
defective.
Refer to figure 2 for the washing section process flow sheet.
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Figure 2: Washing Section Process Flow Sheet
CCD1
CCD5
CCD4
CCD2
CCD3
PACHUCA
DISCHARGE
136A U/F
136 U/F
U/F
U/F
U/F
U/FTo Muntipa
O/F
O/F
To SX Clarifier
Blue
Tank
O/F
O/FTo HPLS Tank
Raffinate
O/F
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4.0 SOLVENT EXTRACTION SECTION
The leached solution is full of dissolved impurities and its copper tenor is very low for electro
winning therefore it has to be purified and concentrated. The solvent extraction plant serves
this purpose. The process involves contacting PLS with an organic solvent into which copper
ions from the PLS are loaded (extraction) and their after contacting the loaded organic with
spent electrolyte to strip off the copper ions from the loaded organic (stripping). Extraction
involves acid generation while stripping involves acid consumption. Therefore, extraction
requires minimal amount of acid in PLS compared to stripping stage which requires high acid
tenor in spent electrolyte. The acid tenor in spent should be between 170 – 175 grams per liter
and 2-3 grams per liter in PLS to achieve targeted extraction and stripping efficiency of 98
and 65% respectively.
Solvent extraction plant is a very critical plant as the organic used is very flammable and
toxic. Organic spills as to be prevented from going into the main drain so that no pollution
results due to organic spills.
Organic spills are washed into the SX sumps where is it recovered by use of tricanter
centrifuge machines and pumped back into the streams. Not only pollution that can be caused
by organic spills but also increased costs as it is the most expensive consumable in the SX
plant.
The plant comprises the solvent extraction streams, organic recovery columns and natco
filters, spillage ponds, new PLS ponds and the clarifier.
4.1 Solvent Extraction Streams
Concentration and purification takes place in the streams with mixer-settler arrangement. A
split circuit is used at Nchanga solvent extraction plant where two streams of PLS are fed on
each end of extraction and producing two different streams of raffinate as compared to the
conventional circuit where only one stream of PLS is fed to the extraction and producing only
one stream of raffinate. The split circuit is preferred at Nchanga SX as it increases the PLS
flows resulting in increased production.
The solvent extraction circuit at Nchanga is 3 Extract and 2 Strip meaning there are three
extraction stages and two striping stages per train and there are a total of four trains (three
trains are run at any one time while keeping the fouth on standby). The streams are Alpha,
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Bravo, Charlie and Delta. Each stream is equipped with two organic pumps running one at a
time keeping the other on standby in case the other pump running becomes defective. The
products of extraction are loaded organic and raffinate. The raffinate produced is used for
leaching and washing, the excess is neutralized and disposed off. The loaded organic is feed
to the striping circuit where the products are advance electrolyte and stripped organic.
Advance electrolyte is pumped to the column flotation cells and natco filters for recovery of
entrained organic and removal of suspended solids before pumping to the tank house for
electro winning while the stripped organic is recycled to the extraction circuit.
The mixer-settlers are arranged in the order E3, E2, E1, S1 and S2. E is for extraction and S for
stripping. Stripped organic from the organic pump is pumped to E3 together with LPLS from
clarifier. The organic flows from E3 via E2, E1 and S1 to S2 and into the organic tank and
then recycled back to E3.
HPLS is pumped to E1 and comes out from E2 as high raffinate (two stage extraction). The
LPLS pumped to E3 comes out from E3 low raffinate (single stage extraction). The organic
from E1 organic weir is called loaded organic and is feed to the stripping side where it is
contacted with spent electrolyte which is high in free acid content and loses its copper into
the electrolyte. Spent electrolyte at 35-40 gpl copper and 170-175 gpl free acid is fed to S2
mixer and come out from S1 advance weir as advance electrolyte with a copper tenor of 45 –
60 gpl and 130-150 gpl free acid tenor.
Close monitoring and control of PLS and organic flows in the streams is very important as
they affect other parameters in the plant like O/A ratios and mixer phase continuity. The
desired O/A ratios are 1.0 – 1.2 on extraction and 2.0 – 2.2 on strip. The ratios are measured
every after two hours so that if there are intolerable deviations to the set parameters necessary
changes to PLS and organic flows can be made. Mixer phase continuity is used to control
entrainments. Aqueous continuous has less aqueous entrainment in organic but more organic
entrainments in aqueous. It is therefore important to run a mixer in the correct phase
continuity to avoid these entrainments. Aqueous entrainment into stripped organic on the
stripping circuit is undesirable as it increases the acid tenor in stripped organic and lower the
extraction efficiency on extraction circuit. Therefore at Nchanga SX, the strip mixers are run
in organic continuous to avoid aqueous entrainments. E3 and E2 on the extraction circuit are
also run in organic continuous to prevent organic entrainments in raffinate. E1 is run in
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aqueous continuous in order to avoid aqueous entrainments in loaded organic and hence
impurities from extraction to strip.
The other monitored parameters are phase disengagement time (PD) which is the time taken
for the phases to separate. A high PD than required will cause entrainments and also shows
deterioration of organic due to impurities. The required PD is required 120 seconds.
4.2 Column Flotation Cells and Natco Filters
The advance electrolyte from the streams has entrained organic and suspended solids and
requires removal before electro winning has they have detrimental effects on the quality of
the cathodes. This organic and TSS removal is achieved through the use of column flotation
cells and natco filters.
There are two column flotation cells, primary and secondary operating in series. Advance
electrolyte from S2 advance weir is pumped to the primary column using column feed pumps
066 and 067. The columns are packed with polyethene bags locally known as onion bags and
coalescers which trap the entrained organic from the advance. After passing the advance
electrolyte in the columns it gravitated into the raw feed tank for storage before pumping to
the filters for removal of TSS and remaining entrained organic.
The advance electrolyte in the raw feed tank is fed to the natco filters. The filters are filled
with silica sand, garnet and anthracite which trap the organic and suspended solids. The
filters are fed with pumps 063 and 064 and after filtration the final advance electrolyte goes
to the advance electrolyte storage tank from where it is pumped to the tank house using
pumps 007 and 009for electro winning.
Figure 3 below shows the process flows in detail in the solvent extraction section.
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E3
E2
E1
S1
S2
Figure 3: Solvent Extraction Section Process Flow Sheet
Stripped
Organic Tank
Lo Raffinate
Low PLS
High PLS
South PLS
Tank
North PLS
Tank
Stripped
Organic
Loaded
Organic
Advance
Electrolyte
Clarifier
/CCD3
O/F
CCD1/C
CD2
O/F
Raw Feed Tank
Spent electrolyteSpent
Electrolyte
Tank
Spent electrolyte
from T/H
Advance electrolyte
to T/H
Advance
Electrolyte Tank
NATCO
Filters
X6
Hi Raffinate Reclaim Tails
Current Tails
To Tailings
Reclaimation
Organic
Recovery
Columns
X2
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5.0 OBSERVATIONS AND RECOMMENDATIONS
For the period I have been on the plant I have interacted with almost every employee in the
covered sections and have learnt and observed a lot of which some have a negative impact on
plant performance. Most of the things mainly are as a result of employee demotivation.
People have no motivation to work and I strongly recommend management to work out
things and see how employee motivation can be improved for better plant performance. Have
also observed the unwillingness of some employees to teach and cooperate with new
employees coming on the plant either full or part time for various programs saying it is not
their responsibility and that it is the responsibility of the training department. This is serious
as it can bring about demotivation and loss of interest to new employees and hence a failure
in learning and development.
6.0 CONCLUSION
In conclusion I would say the familiarization or rather the acquaintance program me is good
and necessary to be undertaken but should be revised and closely monitored for better
performance and utilization of new employees so that both employees especially graduates
and the company have a mutual benefit.
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