METHOD OF ENRICHMENT OF POTASSIUM SILVINITE ORES Russian patent published in 2019 - IPC C01D3/08 B01J19/12 B03D1/01 C05D1/04 B03D101/02 B03D103/10 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. Method of enrichment of potassium sylvinite ores containing clay varieties involves ore crushing, thermal treatment, dry grinding of treated ore till floatation size. Crushed ore is then flotated using a cationic collector and a high-molecular modifier in a saturated salt solution. Ore is thermally treated by acting on it with alternating electric field of ultrahigh frequency in microwave oven. Parameters of said effect, such as radiation frequency, radiation power and duration of exposure, are selected based on the provision of heating temperature of clay differences in range of 250–300 °C, and temperature of whole ore mass is not higher than 180 °C.

EFFECT: invention makes it possible to reduce power consumption in relation to simultaneous increase of degree of extraction into sylvite concentrate.

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