FIELD: mining industry. SUBSTANCE: charged into vacuum evaporation reactor are agent components, and suspension is prepared with residual humidity up to 5% . Mass produced in reactor is conveyed on metal net and cooled down to 20-30 C to transform into crystalline state. Cooling is carried out by supplying cold air from both sides of conveyed mass. Cooling conditions are regulated by varying speed of travel of metal net depending on temperature of mass coming from reactor and mass thickness on net. Produced agent is ground, and powdery agent is supplied by air flow. EFFECT: higher efficiency. 1 dwg
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