METHOD FOR TREATING GROUND CRUDE POTASSIUM SALTS THAT CONTAIN KIESERITE

摘要

The invention relates to the electrostatic separation of ground crude potassium salts containing kieserite. The separation method is characterized in that the ground crude potassium salt is intensively mixed with a conditioning agent containing a combination of an aromatic carboxylic acid or its derivatives, an ammonium salt of an aromatic carboxylic acid, as well as an unbranched fatty alcohol having a chain length of C10 to C15, and subsequently triboelectrically charged at a relative humidity of 1-10%, and separated into a crude kieserite fraction and a crude potassium fraction by means of an electrostatic separation method. By means of use of the method, the kieserite yield is increased, and the selectivity of a subsequent treatment by means of flotation is increased.