Quartz sand is a critical raw material for construction, glass, and foundry industries. Efficient grinding while minimizing fines (<0.075mm) is essential to meet high-value specifications. Here’s how modern equipment optimizes this process.
1. Vertical Shaft Impact Crusher (VSI)
– Uses rock-on-rock crushing to reduce over-grinding
– Adjustable rotor speed (1,500–2,500 rpm) controls particle shape
– Typical output: 0-5mm sand with <10% fines
2. High-Pressure Grinding Roll (HPGR)
– Compressive grinding minimizes micro-cracks in particles
– Gap width: 5-50mm, pressure up to 5 N/mm²
– Energy savings: 20-30% vs ball mills
3. Air Classifier
– Dynamic separators remove fines pre-storage
– Cut size range: 30-300μm
A typical 200tph quartz sand plant includes:
– Primary jaw crusher (PE600×900)
– Secondary cone crusher (HPT300)
– VSI crusher (B9100SE) with air classifier
– Dewatering screen (TSW1848)
| Equipment | Model | Capacity (tph) | Fines Control (%) | Power (kW) |
|—————–|———–|—————-|——————-|————|
| VSI Crusher | B9100SE | 150-300 | ≤8 | 250 |
| HPGR | RP630/17 | 400-600 | ≤12 | 2×500 |
| Air Classifier | VX5000 | 100-200 | Adjustable | 75 |
Q: How to reduce fines in existing ball mill systems?
A: Install a pre-classification cyclone and reduce grinding media size to 15-25mm.
Q: Best moisture content for screening?
A: Maintain <3% moisture using hot air dryers if necessary.
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