Leading international players in coal mining, such as BHP, Glencore, and Peabody Energy, increasingly invest in integrated aggregate processing plants to optimize resource utilization. Modern crushing and sand-making lines convert coal overburden and waste rock into high-quality construction aggregates.
The typical setup includes:
– Primary Jaw Crusher (Capacity: 200-800t/h, Feed size: ≤1200mm)
– Secondary Cone Crusher (Closed-side setting: 25-60mm)
– Tertiary Impact Crusher or VSI Sand Maker (Output fineness: 0-5mm)
– Multi-layer Vibrating Screens (Separation accuracy: ±5%)
| Equipment | Key Parameters |
|---|---|
| Heavy-duty Apron Feeder | Width: 1200-2400mm, Capacity: 500-2000t/h |
| Hydraulic Cone Crusher | Max feed: 300mm, Power: 90-400kW |
| VSI6X Sand Maker | Throughput: 50-650t/h, Rotor speed: 1700-1900rpm |
A Glencore-operated site implemented a 500tph sand-making line processing basalt overburden:
– Raw material: Basalt with SiO₂ content >50%
– Final products: 0-5mm manufactured sand ( value <1.4) and 10-30mm gravel
– Equipment lifespan extended by 30% through tungsten carbide wear parts
Q: How to reduce dust in coal-derived aggregate processing?
A: Implement dry fog systems + enclosed conveyors with <5mg/m³ emission.
Q: Can coal washing rejects be used for making sand?
A: Yes, after removing pyrite through jigging separation (requires >58% SiO₂ content).
Q: Typical maintenance interval for crushers?
