The document outlines the scope of work for supplying and installing a 400 ton/hr dolomite crushing and screening plant. The plant will have two stages of crushing (primary and secondary) and multiple screening units to produce 6 output products sizes. It will include a hopper, grizzly feeder, primary jaw crusher, secondary impactor, vibrating screens, belt conveyors, aggregate storage bins, electrical controls, and will be designed to process dolomite rock up to 1000mm and produce a final throughput of 400 ton/hr. The supplier must guarantee the specified productivity for 1 year and include operation/maintenance manuals and spare parts.

1. 1
Dolomite Crushing and screening plant of 400 ton/hr
Scope of work :
- supply and installation of heavy duty crushing and screening
plant of final productcapacity of 400 ton/hr without the material
passed through the grizzly feeder
- All plant components should be mounted on structural steel
chassis with structural steel supports
- ROM feed up to 1000 mm of dolomite rock
- output products required 400 ton/hr classified as the following:
0 – 3 about 10 %
3 – 12 about 20 %
12 – 22 about 25 %
22 – 40 about 15 %
40 – 80 about 15 %
80 – 120 about 15 %
- the plant is composedof two crushing stages primary and
secondarywith circulating load .
Hopper:
* Construction - Welded steel plate .
- Min. 15 mm thick .
-Complete with external reinforcement.
- Capacity not less than 35 m3
Grizzly Feeder
* Type : Heavy duty vibrating grizzly feeder, smoothvibration,
vibrates calmly, reliable operation and works stably.

2. 2
* Drive: - From twin contra-rotating electric Vibrating two motors,
each with adjustable eccentric weights to determine
feederamplitude or from dual shaft vibrators .
- Vibrancy power can be adjusted.
- Electric motor power suitable for heavy duty operation
Conditions.
* Side plate thickness - Min. 15 mm.
* Bottom plate thickness - Min. 20 mm.
* Springs - Heavy duty.
* Liners - Abrasion resisting steel plate
* Capacity : Not less than 400 ton/hr
Primary Jaw crusher
- Automatic lubrication system
- Fully hydraulic closed side setting adjustment control
- softstarter electrical drive ,380 v, 50 hz ,ip 65,class F
- suitable hydraulic rock breaker
- suitable span Elect. Hoist of min. 10 ton capacity
- one piece frame bearing housing is preferred
Secondaryhorizontal-shaft impactor
- automatic lubrication system
- fully hydraulic CSS adjustment control
- softstarter electrical drive ,380 v, 50 hz ,ip 65,class F
- feeding silo of 20 cubic meter capacity with side
Side plate thickness - Min. 15 mm
Bottom plate thickness Min. 20 mm
- feeding size up to 500 mm
- electric hoist of min. 5 ton for maintenance
Vibrating screen
- Six products screening units according to layout of the
plant

3. 3
- First screening stage consist of two identical
parallel screens
- First screening stage able to withstand the load and
impact of primary crushed material
- all screens must be mounted on heavy duty
chassis, heavy duty springs
- All chutes supported with liners
- Inclined screenangle ( Not more than 22 C ) .
- heavy duty screens motors
Belt conveyors :
- digital weighers in all conveyors of heavy duty type
- all conveyors must be equipped with walkways and
drive side have maintenance platform
- all conveyors complete with emergencyswitches
All accessoriesrequired for ideal performance
- final products conveyors of length not less than 20 m
And width of not less than 800 mm
- motors and gearboxes with ip 65
- all conveyors must include Belt scraper, Emergency
stop switch, Multi - ply conveyor belting
Automatic truck loading control
Aggregate storage bins :
4 compartmentfor products , capacity not less than 35 cubic
meter per each
Electric vibrator on fine bin. Dimensions of bins should be defined.
General notes:
- the tender should be complete with detailed procedures
followed in selectionand dimensioning of all plant components
- all components must be manufactured in USA,Japan or
Europe
- designand manufacturing must be according to SI
standards
- commissioning will be according to the standard norms
- supply of special original tool and measurementkit necessary
for assemblyand disassemblyof all components
- Suppliermust guarantee the plant productivity as
mentioned in his offer for one year at least
- magnetic iron protectionsystem
Operator cabin :
- not less than 20 m2 area

4. 4
- Tropical and dust air-condition
- include all electrical panels
- receptacles wall mounted .
- emergency lighting
Electrical :
- automatic cotrol system
- PVC cables in insulated steel cable duct
- electric motor features :
- Continuous use,
- Totally enclosed external forced ventilation,
- Service factor: 1.00,
- Voltage variation: ±10%
- Adjustable base by sliding.
- A siren is fi tted to give audible warning for the
operation start
Spare Parts :
- 4 screenset for each deck in the plant
- 2 jaws set for jaw crusher
- 2 belt for every conveyor in plant
- 4 set liners for HSI crusher
- 3 set HSI rotor hammers
- 1 spare motor for each crusher
- 1 spare motor plus gearbox for every conveyor
- 2 spare bearing and housing for each one in plant
- 2 spring set for each kit
- 5 bolt kit for each size in plant
- oil and lubrication for 2 year operation
Manuals:
- three hard copy of operation and maintenance ,
Spare parts and workshop manual plus softcopy