Wet High Intensity Magnetic Separators (WHIMS)

Wet High Intensity Magnetic Separators (WHIMS) from Multotec apply magnetism, matrix rotation and gravity to achieve para-magnetic materials separation. Applications include heavy minerals, ilmenite, manganese and iron ore (haematite) beneficiation; PGM upgrading as well as manganese recovery from slimes dams. This offers new approaches and technology for solving para-magnetic minerals separation processes that are as efficient as they are cost-effective.

Magnetic separators that use permanent magnets can generate fields of low intensity only. These work well in removing ferrous tramp but not fine para-magnetic particles. High intensity magnetic separators focus on the separation of very fine particles that are para-magnetic.

Controlled current is passed through an electromagnetic coil, which creates a magnetic field. This magnetises the yoke and finally the matrix ring. The separation matrix material behaves like a magnet and selectively attracts the magnetic fines while the non-magnetic particles fall through the matrix slots and into the non-magnetic launder. The ring is rinsed when it is out of the magnetic field and all the magnetic particles report to the magnetic launder. This technology also employs unparalleled high gradients to allow recovery of fine material down to 15 micron.

The WHIMS was specially adapted by Multotec to accommodate the demands of the African environment. This has resulted in highly specialised magnetic separation equipment that complements and enhances Multotec’s existing solution offering.

  • Operator confidence
  • Lower operating costs
  • Easy, reliable process performance
  • Fine, weakly magnetic minerals recovery from slurries
  • High efficiency paramagnetic particles collection
  • High intensity, high gradient electrical magnet – 17 000 Gauss
  • Stainless steel and coil casing offers increased scaling and corrosion resistance

The WHIMS is ideal for Ilmenite recovery and Silica sand cleaning. The WHIMS recovers fine, weakly magnetic minerals from slurries.

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