METHOD OF PREPARATION OF THE CARNALLITE FOR ELECTROLYSIS Russian patent published in 2007 - IPC C01D3/04 C01F5/30 C25C3/04 

FIELD: mining; methods of production of the enriched carnallite.

SUBSTANCE: the invention is pertaining to the method of production of the enriched carnallite by its separation from the accompanying ores and impurities. The method of preparation of the carnallite for the electrolysis includes reduction of the carnallite ore, its air separation with partition of the carnallite and the halite, the two-stage dehydration of the carnallite. After reduction the carnallite ore is subjected to dressing within two stages in series: at first using the air separation in the furnaces of the fluidized layer at the temperature in the layer of 20-250°С and the gases speed in the layer of 1.5-7.0 m per second, then the produced carnallite is treated with the heavy suspension in the hydrocyclone. As the heavy suspension use the heavy brine of the potassium chloride with the density of 1.5-1.9 g/dm³. The invention allows to improve the quality and to increase extraction of the carnallite from the carnallite ore.

EFFECT: the invention allows to improve the quality of the extracted carnallite and to increase its extraction output from the carnallite ore.

2 cl