Iron ore grinding is a critical stage in mineral processing, requiring robust equipment to handle abrasive materials efficiently. Modern grinding machines optimize particle size reduction, ensuring optimal liberation for downstream beneficiation.
1. Primary Jaw Crushers: Reduce large iron ore lumps to 150-200mm
– Capacity: 50-1,500 t/h
– Power: 55-400 kW
2. Cone Crushers: Secondary crushing to 25-60mm
– Closed-side setting: 6-38mm
– Throughput: 45-1,200 t/h
3. Ball Mills: Fine grinding to 45-100μm
– Diameter: 1.5-4.5m
– Rotation speed: 15-28 rpm
4. HPGR (High Pressure Grinding Rolls): Energy-efficient alternative
– Operating pressure: 4-7 N/mm²
– Specific energy consumption: 0.8-2.5 kWh/t
Raw ore → Vibrating feeder → Jaw crusher → Cone crusher → Pre-screening → Ball mill/HPGR → Spiral classifier → Magnetic separator → Final product
| Equipment | Feed Size (mm) | Product Size (mm) | Capacity (t/h) |
|---|---|---|---|
| Jaw Crusher | ≤1,500 | 150-200 | 50-1,500 |
| Cone Crusher | ≤350 | 25-60 | 45-1,200 |
| Ball Mill | ≤25 | 0.045-0.1 | 5-300 |
| HPGR | ≤80 | 0.5-5 |
