Get to know all magnetic drums and their applications

Magnetic drums are used to separate and concentrate magnetic materials by using a stationary magnet, surrounded by a rotating shell, which imparts movement to the materials in contact.

Magnetic drums have a permanent separator which is very useful for separating iron material from non-magnetic material processed in large quantities, for purity of end products, recovery of commercially valuable metal and protection of processing plant and machinery.

They are widely used throughout the processing industry for the separation of iron contamination from ores, chemicals, food, flour, plastics, grains, sand, cement, fertilizers, abrasives, glass, slag, minerals, rock, refractories and many other products.

Magnetic drums can also have double drum, which fulfills the same objective, but has double magnetism which allows the purity of the material to be much higher. In it, anisotropic and modern permanent magnets with greater coercitivity and eternal magnetic force are used. Machines are available with vibrating material inlet hopper and fully enclosed design to prevent dust formation and contamination.

Among the main features of magnetic drums are:

  • The magnetic drum consists of modern anisotropic permanent magnets of high coercivity.

  • They're strong, rugged teams.

  • They achieve automatic separation of iron impurities.

  • The design is completely enclosed to prevent dust and pollution.

  • They work with temperatures of up to 150ºC, although they could work with higher temperatures, according to the client's requirement.

At IMA, we have two types of magnetic drums:

Magnetic drums in INOX

They are the most widely used for the protection of machines, mills and crushers, among others, and are perfect for the separation of iron parts in a wide variety of processes. This system is composed of two sections: One magnetic and one non-magnetic, so that the material circulating above the magnetic sector can be discharged.

The ferrous particles remain in the drum and then fall when leaving the magnetic sector. These drums are made of stainless steel (AISI 304 or AISI 316) composed of two shafts: one mobile and the other fixed. The movable shaft rotates with the drum, while the fixed shaft is used to position the magnetic field.

Magnetic drums as separators

The magnetic drums in INOX are manufactured with:

  • Ferrite magnet. The magnetic separator with ceramic magnet is useful for the application where large and free iron particles are separated. The average magnetic intensity on the surface of the magnetic drum will be 1500-2000 Gauss.

  • Neodymium magnet. The magnetic separator with high intensity rare earth magnets Nd-Fe-B (neodymium-iron-boron) is useful to eliminate magnetic contamination with low magnetic properties and fine iron particles must be separated. The average magnetic intensity on the surface of the drum will be 3500 - 5500 Gauss.

Magnetic Drums with Diffuser Cabinet

The diffuser cabinet makes the magnetic drum an ideal product for gravity falls from pipes or environments where dust is a problem. The physiognomy of the structure means that 100% of the product falls directly on the magnet, achieving unbeatable results.

The two differentiated outlets of product and ferrous material prevent any leakage or mixture and end up providing the magnet with a complete and automatic magnetic separation system.

Both magnetic drums can work in humid and dusty environments and even at high temperatures of up to 150°C. If this temperature were to be exceeded, it would give rise to a loss of magnetic properties derived from heating, a phenomenon in any case temporary, since when it cools it would recover its initial properties again.

If you would like more information about magnetic drums, please do not hesitate to contact us.

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