High Pressure Grinding Rolls (HPGRs) are advanced comminution equipment widely used in modern aggregate and sand production lines. They utilize inter-particle crushing technology, delivering high efficiency with low energy consumption. HPGRs excel in processing hard ores, limestone, and quartz, producing well-shaped particles ideal for concrete aggregates.
– Efficient Crushing: Applies pressures up to 300 MPa for fine grinding.
– Energy Savings: Reduces power consumption by 20–50% compared to conventional crushers.
– Low Wear: Tungsten carbide studs extend roller lifespan (>10,000 hours).
| Model | Roll Diameter (mm) | Roll Width (mm) | Max Feed Size (mm) | Capacity (t/h) | Motor Power (kW) |
|————-|——————–|—————–|——————–|—————-|——————|
| HPGR800 | 800 | 400 | 50 | 100–200 | 2×160 |
| HPGR1200 | 1200 | 600 | 70 | 250–400 | 2×315 |
HPGRs are often integrated into tertiary crushing or sand-making stages. A typical configuration:
1. Primary Jaw Crusher → Secondary Cone Crusher → HPGR → VSI Sand Maker.
This setup ensures high-quality cubic-shaped aggregates (<5% flakiness) and manufactured sand (FM: 2.6–3.0).
Q: How to maintain HPGR rollers?
A: Regularly check stud wear and rotate rollers every 500–800 hours for even wear distribution.
Q: Can HPGR replace cone crushers?
A: Partially—HPGRs reduce recirculation load but may require cone crushers for initial size reduction.
A quarry in Germany upgraded to an HPGR1200-based line, achieving:
– 30% lower energy use vs. traditional
