FIELD: mineral dressing.
SUBSTANCE: method comprises charging, chemically enriching concentrate, cleaning, and discharging desired product. Chemical enrichment is carried out by way of single or multiple processing in acid or in acids and then in alkali or alkali mixture, while heating material to 900-1000°C and holding it at this temperature in inert gas medium at stirring.
EFFECT: enhanced diamond cleaning efficiency.
6 cl, 1 tbl
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