Method and apparatus for electrostatic separation of crude...

Details Method and apparatus for electrostatic separation of crude... Method and apparatus for electrostatic separation of crude...

B - Operations, Transporting

03

C

209/55

B03C 9/00 (2006.01) B03C 7/12 (2006.01)

Patent

CA 1066230

ABSTRACT OF THE DISCLOSURE Method and apparatus for electrostatic separation of carnallite containing, ground, conditioned crude potassium salts, in air having relative humidity of 5 to 25%, in two stages, by means of high voltage electric fields, characterized in that a carnallite containing fraction is separated from the feed of crude potassium salts in a first separation path whose field length (free fall path) is between 0.4 to 1.2 meters, and that a middlings fraction low in carnallite grain content is directed through a second separation path of 1.5 to 2.5 m of field length (free fall path), wherein a sylvine containing preconcentrate, a middlings fraction and rejects fraction are separated from each other, said rejects fraction being low in the content of valuable components expressed as potassium salts. The middlings obtained at the second separation path pass through a suitable discharge means of the separator and if desired may be recirculated to said second separation path.

273225

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