Close this search box.

Magnetic Separator for Lithium Battery Powder

22 Sep 2021  |
Goudsmit Magnetics of Waalre, the Netherlands has recently produced a rotating magnetic separator intended for the metal-free processing of lithium-ion powder intended for batteries.

The quality of cathode powders such as nickel, cadmium, and lithium must be optimal to guarantee the operation of a battery. Any metal contamination present in the powder reduces the quality of the material mix and leads to a battery’s short life. The automatic cleaning rotating magnetic separator filters metal particles as small as 30 µm from the poorly flowing lithium powder. Lithium is extracted from salt lakes such as the Salar de Atacama in Chile, where there are huge reserves of brine containing lithium. Some large producers process this lithium into a powder that serves as a raw material for batteries used in electric cars, laptops, and mobile phones, among other things.


The magnetic separator contains nine-strong, rotating magnetic bars that prevent the fine powder from sticking to the bars like a bridge. The rotating movement ensures that the product does not block on the bars, so that good deferrization is possible. The contact with the magnetic bars is therefore optimal. This is important because weakly magnetic particles, in particular, must touch the magnetic bars. The pneumatically operated magnetic bars of Ø50 mm have a deep catch field. With a flux density of 12,000 gauss on the bars, the magnet can capture paramagnetic particles such as iron oxide and stainless steel in addition to iron particles. The magnetic separator is dust-proof and can be cleaned automatically. The valve box in the system removes the captured metal particles on-site, as you can see in this video.


The increasing demand for batteries for laptops, telephones, and electric cars, for example, is driving up the price of raw materials extractable from mines. This applies to substances such as nickel, cadmium, and lithium – the cathode powders – as well as to anode powders such as graphite, carbon black, or silica. Magnets play an important role in the final development of lithium batteries, both in the extraction and production phases. The quality of a lithium-ion battery depends on the purity of the raw material. Magnets are also necessary for the recycling of such batteries.

Share this article

This article is published by

Goudsmit Magnetics, driven by magnetism since 1959 Goudsmit Magnetics Group is an international industrial company dedicated to the design and manufacture of magnets and magnetic systems for metal separation, recycling, transport, lifting, holding and demagnetization...

Related Articles