River gravel is a high-quality raw material for construction aggregates due to its hardness and natural rounding. The mining process typically involves excavation, crushing, screening, and washing to produce sand and stone aggregates.
1. Jaw Crusher (Primary Crushing)
– Feed size: ≤1200mm
– Capacity: 50-1500t/h
– Output: 150-300mm
2. Cone Crusher (Secondary Crushing)
– Feed size: ≤350mm
– Capacity: 60-800t/h
– Output: 20-50mm
3. Vertical Shaft Impact Crusher (Sand Making)
– Feed size: ≤50mm
– Capacity: 60-650t/h
– Output: 0-5mm (adjustable)
4. Vibrating Screen (Multi-layer Classification)
– Screening efficiency: ≥90%
– Layers: 2-4
| Equipment | Model | Power(kW) | Output(t/h) |
|---|---|---|---|
| Jaw Crusher | PE750×1060 | 110 | 110-320 |
| Cone Crusher | HST250 | 220 | 180-450 |
| VSI Crusher | B9100SE | 320 | 300-600 |
| Screening Machine | 3YK3070 | 30×2 | – |
Q1: What’s the ideal moisture content for river gravel processing?
A: Below 5% for crushing operations, but washing may require higher moisture.
Q2: How to control aggregate shape quality?
A: Use VSI crushers with rock-on-rock crushing principle for better cubical shape.
Q3: Typical production yield from raw gravel?
