Magnetic Separation Fundamentals
Magnetic separation uses magnetic forces to separate magnetic minerals from non-magnetic or less-magnetic gangue. It is a fundamental separation technique in mineral processing, particularly for iron ore and other strongly magnetic minerals.
Types of Magnetic Separation
Low-Intensity Magnetic Separation (LIMS):
- Used for coarse magnetic mineral recovery
- Typical applications: magnetite iron ore concentration
- Field strength: 0.1-0.2 Tesla
High-Gradient Magnetic Separation (HGMS):
- Captures fine and weakly magnetic particles
- Uses fine steel wool or magnetic matrices
- Field strength: 1-2 Tesla
High-Intensity Magnetic Separation (HIMS):
- For weakly magnetic minerals like hematite
- Dry and wet configurations
- Field strength: 1-5 Tesla
Magnetic Separation Technology
Wet vs Dry Magnetic Separation
Wet Magnetic Separation:
- Processes fine particles in slurry form
- Higher separation efficiency for fine particles
- Requires dewatering after separation
Dry Magnetic Separation:
- Processes coarse particles in air
- Suitable for arid regions
- Lower efficiency for fine particles
Applications
- Iron ore: Primary concentration method for magnetite
- Tungsten: Recovery of wolframite from scheelite
- Chrome: Upgrading chromite concentrates
- Recycling: Metal recovery from industrial waste
WSHT supplies complete magnetic separation systems including drums, matrices, magnets and complete plant solutions.
