As a professional in crushing and sand-making production lines, I’ll share insights into hardrock ore processing facilities. These plants transform raw hardrock into valuable aggregates through systematic size reduction and classification processes.
The typical hardrock processing line includes:
1. Primary Jaw Crusher (PE-900×1200)
– Feed opening: 900×1200mm
– Max feed size: 750mm
– Capacity: 220-450 t/h
2. Secondary Cone Crusher (HPT300)
– Chamber type: EC
– Discharge range: 19-51mm
– Power: 315kW
3. Tertiary Impact Crusher (VSI6X1263)
– Rotor diameter: 1263mm
– Throughput: 350-520 t/h
4. Vibrating Screens (3YK3072)
– Screen area: 21m²
– Deck layers: 3
The optimized flow follows:
Raw ore → Grizzly screening → Primary crushing → Secondary crushing → Screening → Tertiary shaping → Final screening → Storage bins
Closed-circuit systems with return conveyors improve efficiency by recirculating oversized material. Modern plants incorporate PLC control systems for real-time monitoring of crusher loads, screen efficiency, and product gradation.
| Equipment | Input Size | Output Range | Capacity (t/h) |
|---|---|---|---|
| Jaw Crusher | ≤750mm | 150-300mm | 220-450 |
| Cone Crusher | ≤300mm | 19-51mm | 180-380 |
| VSI Crusher | ≤55mm | 0-10mm | 350-520 |
| Screening Plant | – | 5 grades separation | -500max. |
