What is a magnetic roller and what functions does it have?

Magnetic rollers are magnetic separators in the form of bar magnets with a high clamping force of metallic materials.

What are magnetic rollers?

A magnetic roller, also called a magnetic separator, serves to remove ferromagnetic contaminants that have deposited on a product during the production process. Ferromagnetic contaminants are usually deposited as small particles in the product being produced. Magnetic separators have two main advantages in the removal of ferromagnetic contaminants: first, they remove unwanted magnetic contaminants from the product and, second, the production equipment is protected by the removal of metal chips or metal particles. Occasionally, metal particles or chips damage a production plant, so they should be cleaned or repaired.


How do magnetic rollers work?

The magnetic roller is used to filter ferromagnetic materials, regardless of whether these ferromagnetic contaminants should be separated as bulk cargo or general cargo from other products. The flow of material passes under a magnet through a conveyor belt. Ferromagnetic impurities are attracted by the magnet. A second conveyor belt runs transversely underneath the magnet. As a result, ferromagnetic impurities are removed laterally from the magnetic rollers and can be sorted at the end of the belt.

Another application is the magnetic drum. In addition, magnetic separators can also be used in liquid media. Magnetic separators are mainly used for recycling scrap sorting. Here, filtering protects the fabric from damage. Magnetic rollers are used in sedimentology to clean contamination and analyze it.

Magnets are also used in the vehicle. For example, in the drain plug of a transmission. A permanent magnet is often installed here. With the help of attracted metal particles, the wear of the gears can be analysed. In this way you can reduce wear.

Rodillos magnéticos


Magnetic roller applications.

As mentioned above, the installation of magnets on a conveyor belt is a very elegant solution for the removal of contaminants. The magnet is installed in the final area of the conveyor belt. The paper is fundamental, since in addition to its function as a magnet, it also has the paper of a pulley. Any existing magnetic metal impurities will be easily collected while the conveyor belt is running by the magnet. They are then turned towards the bottom of the magnet. The metal particles move in the opposite direction to the magnet. At a given moment, the magnet will reject it and then it will be able to collect the impurities in a container.


Another form of magnetism used to clean impurities are suspension mats in the form of a block or plate, which have such a strong magnetic field that they attract magnetic impurities even at a distance. The maximum diameter of attractable metal particles is approximately 1mm. It can also attract metal particles on a conveyor belt. For this you need large suspension magnets. Suspension magnets can be designed as a permanent magnet and as an electromagnet.

Then there is the form of magnetic filtering with the help of magnetic filters. These are designed as a bar magnet. Bar magnets can also generate extremely strong magnetic flux densities. However, the maximum distance to metal particles is less than in the case of suspension magnets.

Do you still have questions or are you looking for one of the magnets described? Visit the ImagnetShop website.

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