Placer Gold Gravity Separation Plant Case Study
Placer Gold Mining Gravity Separation Case Study
Table of Contents
1. Project Overview
This project involves a classic placer gold deposit with gold-bearing sand layers buried under 0.5m to 1m of overburden. The gold layer thickness varies between 0.6m and 2.5m. The site employs a dry mining approach using excavators and dump trucks to transport raw material to the gold processing plant. Dry mining ensures stable feed control and optimal separation density, which enhances gold grade and recovery rate.
2. Gravity Separation Process
The most mature method for placer gold extraction is gravity separation. This method leverages density differences between metallic gold and gangue minerals. Equipment such as washing drums, centrifugal concentrators, sluice boxes, and shaking tables work in tandem to ensure efficient gold separation. Advantages include long equipment life, low cost, stable performance in all climates, low energy usage, and simple operation.
3. Equipment Configuration
| Equipment | Model | Quantity | Power (kW) | Function |
|---|---|---|---|---|
| Trommel Washing Machine | RXL1850 | 1 | 2 × 22 | Washing and screening |
| Centrifugal Concentrator | STLB100 | 1 | 18.5 | Fine gold (-6mm) concentration |
| Sluice Box | B1000×6m | 3 | - | Coarse gold recovery (+6mm) |
| Shaking Table | LY4500 | 1 | 1.1 | Gold purification |
| Main Water Pump | IS100-65-315 | 1 | 55 | Water source pumping |
| Auxiliary Pump | IS100-80-160A | 1 | 7.5 | Circulation and reuse |
| Belt Conveyor | 800mm×6m | 1 | 5.5 | Discharge transport |
| Diesel Generator | 200kW | 1 | - | Power supply |
| Gold Smelting Furnace | 50AB | 1 | 10 | Gold melting |
| Control System | - | 1 set | - | Energy & process control |
| Total | - | - | 141.6 kW | - |
4. On-Site Operations & Display
- Trommel + Centrifuge Setup: For efficient washing and gold recovery.
- Diesel Power System: Ensures energy autonomy in remote mining areas.
- Shaking Table Recovery: Achieves gold recovery rates exceeding 85%.
- On-Site Engineering Installation: Professional team for fast commissioning and training.
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