Method and apparatus for process for processing ground-up...

Details Method and apparatus for process for processing ground-up... Method and apparatus for process for processing ground-up...

B - Operations, Transporting

03

C

209/3

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

Patent

CA 2019959

A process and a device is disclosed for the electrostatic separation of mineral mixtures, especially raw potassium salts, in a free fall separator, into a coarse fraction and a fine fraction, after the ground-up mixture has been conditioned and electrostatically charged. Each of the fractions is separately electrostatically processed and the fine fraction is fed to a free fall separator where a vertical air flow is generated in the direction from the inlet to foot of the separator. To generate the air flow, tubes or annular pipes made of electrically non-conducting material, are arranged in the discharge ducts of the free fall separator. These devices have nozzle openings oriented towards the foot of the separator and they are connected to a device which generates a negative pressure.

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