Separating sand, copper, and aluminum requires a combination of physical and mechanical methods. Key steps include:
1. Crushing & Screening: Jaw crushers reduce bulk materials to smaller sizes (<50mm), followed by vibrating screens to classify particles.
2. Magnetic Separation: Remove ferrous impurities with drum magnets (field strength: 800–15,000 Gauss).
3. Gravity Separation: Use shaking tables or air classifiers to separate heavier copper (density: 8.96 g/cm³) from aluminum (2.7 g/cm³).
4. Eddy Current Separation: Non-ferrous metals like aluminum are ejected using high-frequency magnetic fields (rotor speed: 3,000 RPM).
A typical sand production line includes:
– Primary Crusher: Jaw Crusher (Feed size: ≤1,200mm, Capacity: 50–1,500 t/h)
– Secondary Crusher: Cone Crusher (Output size: ≤30mm, Hydraulic adjustment)
– Tertiary Crusher: VSI Sand Maker (5–40mm adjustable output, shaping rate >90%)
– Screening: Multi-layer Vibrating Screen (Mesh size: 3–100mm)
| Equipment | Key Parameters |
|---|---|
| Jaw Crusher | Power: 55–400 kW, CSS: 20–275 mm |
| Cone Crusher | Max feed: ≤350 mm, Capacity: 60–1,200 t/h |
| VSI Crusher | Rotor speed: 1,500–3,000 RPM |
Q1: How to improve sand particle shape?
*A:* Use VSI crushers with “rock-on-rock” crushing for cubic grains.
Q2: What’s the copper recovery rate?
*A:* Up to 98% with advanced electrostatic separators.
Project: Copper-Aluminum Recycling Plant in Germany
Solution: Combined jaw crusher
