METHOD OF CONDITIONING CYANIDE-CONTAINING PRODUCTS PRIOR TO FLOATATION EXTRACTION OF NONFERROUS AND NOBLE METALS Russian patent published in 2016 - IPC B03B1/04 B03D1/02 

FIELD: mining industry.

SUBSTANCE: invention relates to beneficiation of minerals, and more specifically to extraction of nonferrous and noble metals from tailings of planning sulphide ores and their beneficiation products. Method of conditioning cyanide-containing products prior to floatation extraction of nonferrous and noble metals comprises conditioning and flotation of valuable components. Conditioning cyanide-containing products is carried out using aldehydes or ketones, preferably formaldehyde. Treatment with aldehydes or ketones, preferably, formaldehyde, can be carried out in a wide range of pH (1.8-13.0) and temperature (5-70 °C). Duration of treatment with aldehydes or ketones, preferably, formaldehyde, must not be less than 5 seconds. Consumption of aldehyde or ketone, preferably, formaldehyde, depends on composition of liquid phase.

EFFECT: technical result is increased extraction of nonferrous and noble metals, as well as reduced content of free cyanide.

4 cl, 2 tbl