Attached Technical Requirements
Technical Requirements Description
1. GENERAL REQUIREMENTS: The crusher plant shall be a brand new, rust-protected, and fixed three-stage crushing system incorporating the most recent technology.
The equipment shall have a proven performance record in tropical environments and be capable of efficiently processing ballast and aggregates of cracked granite rock.
The stone crusher shall be designed and manufactured with the following steel structures for the foundation, it includes maintaining platform, ladder, feeding hopper, discharge chutes, and main supporting frames.
The crusher plant shall have the following specifications, including but not limited to:
A) Capacity 450 metric tons per hour
B) Rock Material Cracked granite rock
C) Material Industrial-grade quality and suitable for continuous operation in the specified site conditions.
2 HOPPER: High-strength steel plate fabricated for receiving and loading boulders into the feeder.
A) Capacity 20-25 Cubic Meter
C) Material High-strength steel plate fabricated with ease for maintenance and repair.
3. FEEDER: Heavy-duty Apron variable-speed or vibrating grizzly feeders for controlled material feeding designed to feed the primary jaw crusher of feeding size up 850 mm
A) Feed capacity: 450 metric tons per hour
B) Material: High strength alloy steel and abrasion-resistant steel alloy or high-chromium cast iron.
C) Feed Type: Apron or High-strength steel vibrating feeder
4. PRIMARY JAW CRUSHER: Heavy-duty, single-toggle jaw crusher with side protects plates
A) Feed Size: Up to 850 mm
B) Material: High strength alloy steel for crushing jaws and high-strength steel for the frame.
C) Productive Capacity: Minimum 350 mtph.
D) Discharge size: 0 - 200 mm
E) Working mode This 0-850 mm material will be sent to the bypass screen by sieving before entering the jaw crusher.
Bypass sieve 0-12 mm waste product will be obtained according to the cleaning condition of the material.
Crushed material (0-200 mm) in jaw crusher, which is primary crusher, will be conveyed to a 2 deck vibrating screen before sent to secondary rotary cone crusher by belt conveyor.






The 0-12 mm waste product will be obtained and +12 mm will be sent to secondary crusher.
5. SECONDARY CONE CRUSHER: Type: Hydraulic rotary cone crusher
A) Feed Size: Up to 200 mm
B) Material: Chromium-Vanadium or equivalent high strength alloy steel for the mantle and concave, and high-strength cast steel for the frame and eccentric.
C) Productive Capacity: Minimum 280 mtph.
D) Discharge size: 0 - 80 mm
E) Working mode The material from the rotary crusher (0-80 mm) will be sent to 4deck vibrating screens to obtain 25-63 mm ballast, 0-5 mm subballast+aggregate material.
Materials over + 65 mm are fed back to the rotary crusher by return. The remaining 5-25 mm conveyor belt is sent to VSI
6. TERTIARY IMPACT CRUSHER: Vertical shaft impact (VSI) crusher to produces cubical, and well-shaped aggregates.
A) Feed Size: Up to 40 mm
B) Material: Tungsten Carbide-tipped or high-chromium white cast iron for the rotor/impeller, and manganese steel or chromium-alloyed steel for the wear liners or equivalent.
C) Productive Capacity: Minimum 100 mtph.
D) Discharge size: 0 - 25 mm
E) Working mode The 5-25 mm (depending on sieve size) conveyor belt is sent to VSI. Here, the crushed material is sent to the 3deck vibrating screens to obtain a material of 0- 5, 5-10, 10-25 mm and the material over +25 is fed back into the VSI crusher by return.
7. CONVEYOR SYSTEM: Shall have Heavy-duty steel shafts and bearings for the idler rollers, and heavy- duty continuous belt conveyors for material transfer between crushing stages. Materials: Reinforced with high-strength steel shafts and bearings for the idler rollers, and heavy-duty, multi-ply nylon or polyester carcass with wear-resistant rubber covers for the belt fabric.