PROCESS FOR THE TREATMENT OF NATURAL POLYMINERAL SALT, COMPRISING CLAY WITH THE PREPARATION OF POTASSIUM-MAGNESIUM FERTILIZER AND MORTGAGE MATERIAL FOR DRY LAYING OF PRODUCED SPREAD OF MINES

摘要

A process for the treatment of polymineral natural potassium salts, comprising clay with the preparation of potassium-magnesium fertilizer and filling material, suitable for dry laying of worked-out area of mines, and dry polymineral potassium natural salt, ground to particles, is divided by sieving onto particle-size fractions, and each fraction is separately divided in magnetic field into magnetic fractions with high content of clay and into nonmagnetic fractions, comprising potassium-magnesium minerals and component of natural potassium salt halite, then nonmagnetic fractions, comprising small quantity of clay, are combined, ground again and divided in neutral floatation slurry to mineral composition using known floatation reagent to potassium concentrate, comprising KO and to wastes, making up primary halite.