Dragline machine at dhudhichua project ,singrauliTauhid Mohammad
A dragline excavator is a piece of heavy equipment used in civil engineering and surface mining.
Draglines fall into two broad categories: those that are based on standard, lifting cranes, and the heavy units which have to be built on-site.
MIning Engineering, Material Handling, Rope haulages, Types of cars, selection of cars, factors of choice, Parameters of selection, granby, W-shaped,, Rocker dump, end dump, box type, gable bottom.
Design and analysis of ball mill inlet chute for roller press circuit in ceme...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
This cone crusher is suitable for crushing various kinds of ores and rocks with medium over hardness and it has the features of reliable structure, high production efficiency, convenient adjustment and economic use. The spring safety system is the overload protection device which is able to make the iron go through the crushing chamber without damaging machine.
Dragline machine at dhudhichua project ,singrauliTauhid Mohammad
A dragline excavator is a piece of heavy equipment used in civil engineering and surface mining.
Draglines fall into two broad categories: those that are based on standard, lifting cranes, and the heavy units which have to be built on-site.
MIning Engineering, Material Handling, Rope haulages, Types of cars, selection of cars, factors of choice, Parameters of selection, granby, W-shaped,, Rocker dump, end dump, box type, gable bottom.
Design and analysis of ball mill inlet chute for roller press circuit in ceme...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
This cone crusher is suitable for crushing various kinds of ores and rocks with medium over hardness and it has the features of reliable structure, high production efficiency, convenient adjustment and economic use. The spring safety system is the overload protection device which is able to make the iron go through the crushing chamber without damaging machine.
Rautomead Newsletter issue 03
continuouscasting.com
For over 30 years Rautomead Limited has specialised in the design and manufacture of continuous casting equipment for non-ferrous metals and alloys. There are now more than 300 Rautomead machines in operation in over 45 different countries worldwide.
Rautomead plants are being successfully applied to production of oxygen-free copper, a wide range of copper-based alloys, precious metals and zinc. Forms include wire rod, straight length bars, flats and hollow sections. According to material and section, the casting process selected may be vertical upwards, vertical downwards or horizontal. The machines may be used either as integrated melting, holding and casting machines, or may be arranged to be fed with pre-alloyed molten metal.
The Rautomead Continuous Casting System is based on electric resistance heating of its furnaces, with graphite containment crucibles, graphite heating elements and casting dies. This technology is particularly suited for production of high purity, high quality oxygen-free copper and copper alloy wire rods (copper silver, copper magnesium, copper tin).
The upward casting equipment may be used to manufacture rods of all diameters between 8.0mm and 30mm diameter and is suitable feedstock for wire drawing and continuous rotary extrusion processes. End use applications include: superfine wire, automotive wires, contact wire and trolley wires for high speed trains, data communication cables, CTC and transformer strips as well as enamelled wires.
Rautomead’s R&D facility at the factory in Dundee (casting equipment, technicians, design and operational experience) is available to companies who wish to commission experimental and research work to develop technology and tooling for the manufacture and processing of new alloys and materials. Rautomead’s partnership with the University of Dundee provides access to sophisticated laboratory equipment as well as support with analytical evaluation and academic contributions to the R&D effort
The companies of Altra Industrial Motion offer many critical drivetrain products utilized in mine and quarry applications including clutches & brakes, enclosed gearing and geared motors, couplings, overload clutches and torque-limiting devices, and belted drives.
Amrt technology overview september 2014Victor James
Advanced Mineral Recovery Technologies, (AMRT Ltd.) is an authorised & licensed operating company utilising the Advanced Mineral Recovery Technologies (“AMRT”) patented process. Some of the shareholders of IMS are also shareholders in AMRT.
AMRT has a proprietary technology for treating the waste streams from mining and smelting operations whereby the valuable metal content is recovered while the potentially hazardous waste is converted to an environmentally-inert slag.
The technology is broadly applicable: virtually all mining & smelting works creates waste in the form of dust, fines or slag.
Las implicancias del memorándum de entendimiento entre Codelco y SQM según la...Voces Mineras
En su informe, la consultora examina las implicancias financieras, estratégicas y ambientales de esta alianza, explorando las consecuencias a corto y largo plazo para ambas empresas, así como para el panorama minero chileno.
Memorándum de Entendimiento (MoU) entre Codelco y SQMVoces Mineras
Plusmining publicó un detallado estudio que analiza el Memorándum de Entendimiento (MoU) entre Codelco y SQM para la operación conjunta del Salar de Atacama. En su informe, la consultora examina las implicancias financieras, estratégicas y ambientales de esta alianza, explorando las consecuencias a corto y largo plazo para ambas empresas, así como para el panorama minero chileno.
En una presentación a los socios de Voces Mineras A.G. y contactos cercanos, el director ejecutivo de Plusmining planteó que si bien las últimas indicaciones del Ejecutivo suavizan el efecto negativo de un impuesto ad valorem, la tasa total efectiva sube a cerca del 50%, “que es una línea roja desde el punto de vista de los inversionistas”.
The Copper Mark: La iniciativa que apunta a reconocer la minería responsableVoces Mineras
Cómo se gestó la iniciativa The Copper Mark, cuáles son sus objetivos y alcances, fue explicado en detalle por Víctor Pérez, integrante del Consejo Asesor de esta entidad que promueve un cobre producido responsablemente. El también miembro de Voces Mineras hizo una presentación a los demás socios de la organización gremial durante una reunión-almuerzo, la que fue además transmitida vía telemática.
Presentación Cristian Quinzio para foro de Voces MinerasVoces Mineras
En el foro realizado por Voces Mineras, el abogado planteó una serie de propuestas para dinamizar este sector, sobre el cual dijo que “tenemos un gran tesoro, pero si lo seguimos guardando, va a estar obsoleto”.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
1. Egbert Burchardt
Grinding Technology – Mineral Processing
Santiago de Chile I 28.08.2019
Voces Mineras: Nuevas Tecnologias Que Revolucionan La Minera
POLYCOM HPGRs
An Innovative and Matured Comminution Tool for the Mining Industry
2. 2
POLYCOM Principles
….. between two counterrotating rolls which are fed from the top.
One of the rolls is fixed. The second roll is floating
and pushed by a hydraulic system towards the fixed roll.
The ore is ground in a HPGR
by introducing high grinding pressures
into a material bed …..
3. 3
POLYCOM Hard Rock Applications and References (Copper / Gold / Iron / Platinum)
Pebble crushing
in greenfield concentrators
Partial pre-crushing
for up-grades of existing SABC plants
by de-bottlenecking the SAG mill
4. 4
POLYCOM 20/15 – 2 x 1,750 kW
1,061 tph < 10 mm closed circuit product
KAZ Minerals – Bozshakol Start-up in 2016
KAZ Minerals – Aktogay Start-up in 2017
KAZ Minerals – Aktogay 2 Start-up in 2020
POLYCOM for Pebble Crushing in SABC Circuits
Bozshakol
Plant capacity: 3,425 tph (75.000 tpd)
1 x SAG mill Ø 12.2 x 7.9 m EGL – 28 MW
2 x Ball mill Ø 8.5 x 13.4 m EGL – 22 MW
5. 5
POLYCOM Hard Rock Applications and References (Copper / Gold / Iron / Platinum)
Tertiary crushing
in greenfield concentrators
Quaternary crushing
for up-grades of existing crushing & grinding plants
by de-bottlenecking the ball mills
6. 6
2 x POLYCOM 20/15 – 2x 1.800 kW
Freeport in operation since 2007
PTFI Grasberg > 15 % plant capacity increase due to HPGRs
Refer to Paper SAG 2011:
EFFECTS OF HPGR INTRODUCTION ON GRINDING PERFORMANCE AT PT FREEPORT INDONESIA’S CONCENTRATOR
Quaternary Crushing for Concentrator Up-grades
7. 7
SPCC - Toquepala
1 x POLYCOM 24/17 – 2 x 2,650 kW
Start-up during 2nd quarter 2018
Situation:
ball mill bottleneck due to harder ore =>
production dropped from 60 ktpd to as low as 51 ktpd
Approach:
re-crushing of the complete crusher product to produce finer BM feed
Achievement:
plant production was brought back to more than 60 ktpd
Quaternary Crushing for Concentrator Up-grades
8. 8
Freeport
Cerro Verde
copper
108.000 tpd
4 x POLYCOM 24/17
5.0 MW each
Start up in 2006
Newmont
Boddington
gold
97.000 tpd
4 x POLYCOM 24/17
5.6 MW each
Start up in 2009
Anglo Platinum
Mogalakwena
platinum
20.000 tpd
1 x POLYCOM 22/16
5.6 MW
Start up in 2008
POLYCOMs for Tertiary Crushing in Large Concentrators
10. 10
Freeport - Cerro Verde 360.000 tpd copper concentrator
Cerro Verde 1 (2006) 120,000 tpd
4 x POLYCOM 24/17 – 5.0 MW
4 x Ball Mills Ø 7.3 x 11.0 m EGL – 12 MW
Cerro Verde 2 (2015) 240,000 tpd
8 x POLYCOM 24/17 – 5.0 MW
6 x Ball Mills Ø 8.2 x 14.6 m EGL – 22 MW
POLYCOMs for Tertiary Crushing in Large Concentrators
11. 11
POLYCOM Performance Results Copper Concentrators
Plant Peru Plant Chile
achieved (design) achieved (design)
POLYCOM circuit product mm < 5.5 < 8
Higher throughput capability tpd > 35,000 (27,000) > 40,000 (28,000)
(each POLYCOM 24/17
@ circuit product size and 92 % utilization)
Lower energy consumption kWh/t < 2.7 (3.2) < 2.5 (2.9)
(@ circuit product size)
Longer roll life h > 10.000 (6,000) > 7.000 (6,000)
12. 12
POLYCOM vs. SAG Mill Based Plants
Cons
• POLYCOM HPGRs require a more complex material handling system and screening
⇒ higher capex
Pros POLYCOM HPGRs are
• more energy efficent than SAG mills (the harder, the higher is the POLYCOM efficiency!
⇒ lower opex in terms of energy and wear
• less sensitive against ore variability
⇒ higher average plant capacity (due to less fluctuations)
⇒ higher recovery (due to stable flotation at uniform feed size and rate)
Trade-off: Capex vs. Opex & Production
13. 13
POLYCOM vs. SAG Mill Based Plants Case Study – Energy Consumption
+/- 0.4 kWh/t
Axb values between 70 (soft) and 25 (competent)
• SAG mill energy varies between 4 kWh/t [@ Axb = 70] and 11 kWh/t [@ Axb = 25]
• POLYCOM energy 2.7 kWh/t in average
(variation of about +/- 0.4 kWh/t for various copper ores at same T80)
14. 14
POLYCOM vs. SAG Mill Based Plants Case Study – Opex
Axb values between 70 (soft) and 25 (competent)
• SABC operating cost(*) varied between 1.7 and 2.6 US$/t in the study
• up to 1 US$/t lower opex(*) for a HPGR based circuit
• up to 19 MW less power supply required for HPGR plant
(*) energy and wear of comminution equipment)
15. 15
POLYCOM Maintenance Requirements
• scheduled maintenance between 160 and 185 hours per year (~ 2 % of time)
• roll unit replacement is longest maintenance duty (~ 36 – 48 hours)
• manual inspection of roll surface can be avoided by on-line roll measurement
16. 16
POLYCOM Operating Cost
based on one roll unit change out per year
w/o energy cost and spare parts
Rolls and cheek plates about 90 %
Manpower / labour about 8 %
Importance of rolls and cheek plates!
17. 17
POLYCOM Design and Innovation Wear Protection System
Cheek plates
seal the gap towards the roll edges
about 2,500 to 3,000 hours lifetime
1st generation – light design 3rd generation – heavy duty design
System
• Cheek plates
18. 18
System
• Cheek plates
• Roll surface
POLYCOM Design and Innovation Wear Protection System
Lifetime of the rolls is between 6,000 hours and more than 20,000 hours in hard rock
depending on ore abrasiveness, ore toughness and feed size.
Properties of the wear material must match ore properties => data base required!
19. 19
POLYCOM Design and Innovation Wear Protection System
System
• Cheek plates
• Roll surface
• Roll edge and side protection
1st generation –
glued edge blocks
3rd generation
– bolted edge blocks
can be replaced individually
prevents early roll damage
and maximizes roll life.
20. 20
On-line monitoring of roll surface by continuous laser measurement - POLPROTECT
Laser sensor moves along roll width (top) within a rubber sealing (right hand)
Achievements:
• permanent info about wear on roll surface ⇒ operating conditions can be adjusted
to meet scheduled change out time
• detection of broken studs or edge blocks ⇒ indicator of tramp metal
or excessive oversized feed
POLYCOM Maintenance Requirements Condition Monitoring of Roll Surface
21. 21
POLYCOM Design and Innovation Use of „Flanges“ on POLYCOMs
cheek plates and flanges
seal the gap towards the roll edges
flanges
attached
to rolls
Initial perception:
skew must be mechanically
suppressed in order to avoid that
roll touches flanges
=> heavy and expensive design
22. 22
POLYCOM Design and Innovation Use of „Flanges“ on POLYCOMs
cheek plates and flanges
seal the gap towards the roll edges
flanges
attached
to rolls
field trials proved:
flanges on POLYCOMs work w/o implemented skew suppression
if applying roll parallel control as well as protective electrical and mechanical interlocks
23. 23
Use Of Flanges on POLYCOM HPGRs
pilot test with flanges on MAGRO (Ø 950 x 350 mm)
• more uniform pressure distribution along roll width
• 30 % higher specific throughput
• 25 % lower specific energy input (per pass)
• small increase (2 – 3 %) in product fineness @ 6 mm
long term field trials with flanges on POLYCOM 24/17
• 15 to 20 % higher specific throughput
• 0 to 10 % lower specific energy input
• no significant increase in product fineness
24. 24
Summary
• more than 400 polycom® HPGR references with more than 50 in hard rock applications
• polycom® circuits: more energy efficient and less sensitive to ore variability than SABC circuits
⇒ constant high throughput, low operating cost and reduced CO2 footprint
• successful up-grades of existing crushing and grinding circuits with polycom® HPGRs
⇒ higher revenue due to increased plant throughput and recovery
• low opex: polycom® offers longer roll life, higher throughput and requires less energy
than original design figures specified
• high availability due to robust design, low maintenance needs, long roll life and fast roll change-out
• polycom® can be equipped with flanges to increase throughput
w/o the need of mechanical skew suppression
25. Egbert Burchardt
Grinding Technology – Mineral Processing
Santiago de Chile I 28.08.2019
Voces Mineras: Nuevas Tecnologias Que Revolucionan La Minera
POLYCOM HPGRs
An Innovative and Matured Comminution Tool for the Mining Industry