FIELD: mineral concentration. SUBSTANCE: gold-containing ore is ground and classified into overflow and sands. Grinding is carried out in rotary-pulsing apparatus of hydropercussion action with volumetric power in working space of 2.3 to 5.2 MW/cu.m and pulsation frequency of 1.5 to 5 kHz. Solid-to-liquid phase ratio is from 13 to 1-9. Classification sands exceeding limit sizes are directed for final grinding to rotary-pulsing apparatus. Process is carried out at excessive pressure at apparatus inlet from 3 to 14 atm. EFFECT: higher efficiency of concentration. 3 cl
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