Rare-Earth Drum Magnetic Separators

By optimizing the effective magnetic force with a unique magnetic circuit design, enhancing conventional designs, and using powerful rare-earth magnets, an advanced generation of high-intensity drum separators are created. Several basic magnetic strength versions are standard. Rare-earth drum separators can be used to upgrade previous state-of-the-art drum separator applications, which now require stronger magnetic forces. Outotec drum separators achieve magnetic forces matching or exceeding those of other medium strength drum separators but at a substantially lower cost.


Standard models have 6 magnetic poles in an axial configuration.

Currently there are two different drum diameters available: 41 cm (16”), and 61 cm (24”). Process widths vary from 20 cm to 1.5 meters (8” to 60”). 

Drum separators may be single modules or stacked in two or more stages. Combinations of different size drum diameters are also possible.

Particle Size Range: 100 mm (4”) to 0.05 mm.



Operating Principle

Like other drum separators, the magnetic yoke is positioned stationary inside a rotating shell (made of a nonmagnetic material such as stainless steel). In the Outotec magnetic dry drum separators, the yoke is not only adjustable with regards to the angular position, but the distance between the yoke and the shell can also be changed.

Dry process separators have either a top feed system using a special roll feeder with slide chute, or a vibratory feeder. The feed may also be presented as a curtain, falling adjacent to the shell periphery.



Minerals and materials applications

Established applications cover hematite and martite iron ores, garnet upgrading, ilmenite ore, “black sand” processing, pyrrhotite removal, and fine grinding media particle removal. Studies are in progress for material processing less magnetic materials and minerals.

Where drums serve you:

  • Removal of magnetic impurities from non-metallic minerals

  • Magnetic concentration of metallic minerals (Fe, Ti, Cr, Mn )

  • Pre-concentration of coarse particles (75 - 0mm)

  • Cross Belt Magnet Replacement

  • Removal of medium magnetic materials before WHIMS