Magnetic Rolls and Wet Mineral Separation

The methods to produce a magnetic field which induces differential polarizing forces in mineral particles and the use of this property for the purpose of mineral separation has so far been considered for the operation of separators under dry conditions. However when the feed to the separators is in the form of a slurry, the design of magnetic separators has to be reconsidered, with the basic separating forces already described remaining unaltered. In a wet environment, a low-intensity drum is immersed in a slurry with the internal magnetic segments arranged as shown in Figure 1.

Drum diameters of commercial units vary up to 1200 mm with corresponding lengths up to 3600 mm. The lower portions of the drums are partly submerged in the feed which carry up to 35 % solids.
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