Alluvial gold mining requires specialized equipment to extract and process gold particles from riverbeds or sedimentary deposits. As a professional in crushing and sand-making production lines, I’ll outline the core components of a complete alluvial gold processing system, focusing on efficiency, durability, and recovery rates.
1. Trommel Screen:
– Capacity: 50–300 TPH
– Screen mesh: 5–50 mm adjustable
– Power: 15–75 kW
2. Centrifugal Concentrator:
– Recovery rate: ≥95% for +0.074 mm gold
– Feed capacity: 10–40 TPH
– Water consumption: 80–150 L/min
3. Jig Separator:
– Particle range: 0.5–30 mm
– Stroke frequency: 100–400 rpm
4. Sluice Box:
– Length: 3–6 m (modular design)
– Riffle height: 50–100 mm
– Feeding Hopper: Equipped with grizzly bars (spacing: 50–100 mm) to remove oversized rocks.
– Sand Pump: Critical for slurry transportation (flow rate: 200–800 m³/h).
– Deck Vibrating Screen: For preliminary classification (layers: 1–3).
| Equipment | Key Parameter | Value Range |
|——————–|———————–|——————-|
| Trommel | Rotation Speed | 15–25 RPM |
| Centrifugal Concentrator | G-force | 60–200 G |
| Jig Separator | Pulse Amplitude | 5–30 mm |
Q1: What’s the minimum gold particle size recoverable?
A: Centrifugal concentrators can capture particles as fine as 20 microns, but optimal recovery starts at 74 microns (+200 mesh).
Q2: How to handle clay-rich deposits?
A: A scrubber or clay breaker should be added upstream to disintegrate agglomerates.
