Efficient Removal of Metal Impurities from Materials
The need to sort materials by size or composition arises at various stages of production and recycling processes. One of the most common tasks is the removal of metal contaminants from materials intended for further processing, or their reliable detection. When using separators or metal detectors, it is essential to create a non-magnetic zone at the installation site to ensure accurate and effective separation.
Separators of magnetic materials are used to remove metals from bulk or piece materials on conveyor systems within production lines. When designing these systems, it is important to take into account the material layer height and the required strength of the magnetic field.
Types of Magnetic Separators
Different types of separators are employed to extract metal components from transported material, with the choice depending on the quantity and nature of metal pieces present.
Options include:
- Stationary magnets – metal parts are removed manually.
- Overband magnets with automatic cleaning – metal parts are automatically removed from the conveyor.
- Drum separators or magnetic drums integrated into belt conveyors – ideal for continuous separation of larger material volumes.
Types of Magnets Used
The strength of the separator’s magnetic field depends on the type of magnet employed:
- Permanent magnets – standard solution for general applications.
- Rare earth magnets (NdB) – for very strong magnetic fields.
- Electromagnetic separators – the magnetic field is generated by an induction coil and can be switched off if required.
