During sorting, a solid compound is separated according to its material characteristics.
Magnetic separation is a method of sorting which utilises the magnetisability of components of a solid compound. Magnetic separators are often used in coal and ore preparation.
In it, the solid compound to be separated is charged into the feed hopper. A vibrating trough conveys the compound onto a rotating, non-magnetic drum. Its speed can be adjusted by way of a potentiometer. In one area of the drum there is a fixed permanent magnet. Non-magnetisable components drop into a collector tank due to gravity. Magnetisable components adhere to the drum in the area of the magnet, are carried along and drop into a different tank as soon as they are beyond the magnetic zone. The mass flow of the feed material can be adjusted by way of the distance of the hopper outlet from the vibrating trough and by the throw and frequency of the trough. A mixture of sand and small steel items, such as hexagon nuts, is recommended and supplied for use as the feed material.
Learning Objectives And Experiments
- Familiarisation with the fundamental principle and the method of operation of a drum-type Magnetic separator
- Efficiency of separation process dependent on
- Mass flow of feed material
- Mixing ratio of feed material
- Type of feed material
- Drum rotation speed
Specification
- Drum-type magnetic separator for separation of magnetisable components from a solid compound
- Separation by a fixed permanent magnet in an area of a rotating, non-magnetic drum
- Feed hopper with vibrating trough for feed of solid compound to drum
- Dosage of feed material by way of distance of hopper outlet from vibrating trough, throw and frequency of vibrating trough
- Drum rotation speed adjustable by electric motor with potentiometer
- 2 steel tanks for separated fractions and 1 tank for solid compound
- Feed material: sand and hexagon nuts
Technical Specification
- Feed hopper capacity: 25L
- Vibrating trough
- Throw: 0,2…1,5mm
- Vibration frequency: 50Hz or 100Hz
- Drum
- Ø 220mm
- Length: 300mm
- Magnetic field range: 180°
- Speed: 0…30min-1
- Motor
- Power consumption: 250W
- Max. Particle size
- Non-magnetic: 20mm
- Magnetic: 20mm
- Tanks
- 2x 15L
- 1x 20L
- 230V, 50Hz, 1 phase
- 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
