Electrostatic-separation utilizes the difference in electrical conductivity between the various minerals in a feed material to produce differential movement in the mineral grains, and although it is applied as a concentrating process to only a small number of minerals, it has proven to be highly successful with these. The major application has been in separating rutile, ilmenite, and zircon from beach sands and tin ores from stream placers. Though there are also other uses, such as upgrading Florida phosphate concentrates, separating scheelite from pyrite, separating chemical salts, removing metal grindings from abrasive-wheel sands, and producing high grade concentrates of specular hematite.
KeywordsGranular Material Beach Sand Conductor Particle Rotor Surface Discharge Electrode
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