Rare Earth Roll Magnetic Separators

A combination of the most recent advances in rare-earth magnet technology and years of industrial experience make Outotec rare-earth roll separators the industry standard.


Advanced features and options make the Outotec® line of neodymium magnetic separators extremely operator friendly. Units include a thin belt tracking system and a patented belt guidance system to both aid in operation control and dramatically improve belt life. A removable cassette and/or cantilever design means easy servicing for maintenance personnel.



Outotec® laboratory magnetic roll separator performance can be directly scaled for your feed to commercial machines. All commercial units can be stacked in one, two, three or more roll modules. Each unit is modified to achieve your particular product specifications.


Standard Outotec® rolls are offered in 150mm (6”), and 100mm (4”) diameters with designed ratios between magnet disk and steel disk thickness. Each roll is tailored for the optimum magnetic strength needed for your process.

You can select magnetic zone widths from 100mm (4”) to 1,500mm (59”). Several neodymium magnet qualities are offered, handling feed temperatures up to 120°C. Additionally, a newly developed high-strength magnet material is now available for lower temperature applications. This advanced material has improved magnetic strength and depth of field, but only at lower ambient temperatures. In addition to our tried and true standard designs, high efficiency models are also available for finer feeds, i.e. <75µm. Inquire about our HE models to learn more.


Operating principle

Material is fed evenly onto the separator belt and is transported over a magnetic roll of unique design. As the feed material moves through the magnetic field all magnetic
(including weakly magnetic) particles are attracted to the roll. Depending on the magnetic susceptibility of the particle it either:

  1. Becomes attached to the surface of the belt and is subsequently released as it travels away from the magnetic field;

  2. Is drawn toward the belt and its trajectory is altered from that of the nonmagnetic particles as they are thrown from the rotating roll.



Minerals and materials applications

  • Andalusite

  • Manganese

  • Alumina

  • Magnesite

  • Bauxite

  • Micaceous hematite

  • Borate

  • Mulite

  • Bone Flour

  • Monazite

  • Barite

  • Nepheline syenite

  • Bentonite

  • Nickle laterite

  • Calcined bauxite

  • Phosphate ore

  • Calcium carbonate

  • Perlite

  • Chromite ore

  • Pigments

  • Chamotte

  • Potash

  • Clay

  • Pyrophyllite

  • Cullets

  • Quartz/Quartzite

  • Ditomaceous earth

  • Quartz 

  • Diamonds

  • Rare-earth ores

  • Dunite

  • Rutile

  • Feldspar

  • Rock salt

  • Fluorspar

  • Radionuclides

  • Garnet

  • Silica

  • Gold

  • Scandium ore

  • Graphite

  • Sodium sulphate

  • Ilmenite

  • Spodumene

  • Iron ore

  • Talc

  • Kaolin

  • Trona

  • Kyanite

  • Vermiculite

  • Leucoxene

  • Wollastonite

  • Limestone

  • Zircon