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Magnetic drum separators for recycling

Application

The drum magnets for recycling are suitable for separation of ferromagnetic (Fe) or paramagnetic particles from a bulk material flow. Drum magnets have many uses and are suitable for a wide range of applications. They can handle high volumes, because the drum rotates continuously and therefore separates and carries away ferrous particles automatically. Drum magnets can also be an attractive solution due to their compact installation dimensions. This allows them to be placed where there would be too little room for other options, such as hanging or overbelt magnets. To achieve good separation it is important that the material is supplied in a consistent flow, which can be achieved with a vibratory chute or conveyor belt for example.


Magnet drum used in granular flow

Operation

A drum magnet consists of a stationary magnet segment, around which a stainless steel shell with carriers rotates. The product flow falls over the shell, while the magnet attracts the ferromagnetic metal particles in the product. Carriers on the shell carry the captured metal particles to the underside of the drum, outside the magnetic field. There the separated particles drop off and can be collected and/or carried away. This is often achieved through use of a separation partition. Through the use of various magnetic systems, it is possible to capture both ferromagnetic (‘strongly magnetic’) and weakly magnetic particles.

Placement

There are two methods for use/placement of drum magnets:

Overfeed

For overfeed drum magnets the material is fed over the drum. As soon as the iron particles come within range of the magnet they are drawn to it and carried over the drum until they are once again outside the magnetic field. The iron particles are then released and fall behind a separation plate.






 

Top Feed / overfeed with drum magnet

Underfeed

For underfeed drum magnets the bulk material is fed beneath the drum. As soon as the iron particles enter the magnetic field they are drawn to it and carried over the drum towards the top. The carriers push the iron particles along until they are outside the magnetic field, where they fall off the drum. The advantage of this separation method is that only the iron particles within the material flow are attracted, which means that less product comes between the iron particles, so the resulting iron fraction is purer (saleable). This method is therefore suitable for placement over a belt; just as with overbelt and hanging magnets.

Underfeed with drum magnet

Products

Magnetic drum separators Recycling

For separation of magnetic and weakly magnetic ferrous particles from a flow of material.

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Permanent drum separators for scrap

Applications: recycling of scrap. High capacity and deeply penetrating magnetic field. For the separation of extra large and sharp ferrous particles.

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Electro drum separators for scrap

Applications: recycling of scrap. High capacity and very deeply penetrating magnetic field. For the separation of extra large and sharp ferrous particles.

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