The invention discloses a comprehensive
recovery method for directly cyaniding, consolidating and leaching polymetallic gold concentrate, which comprises the following steps: after the gold concentrate is pulped, fractionated and grinded, qualified grinded and fractionated products are subjected to
dehydration and
reagent removal operation, and underflow is subjected to pre-alkaline leaching operation; pulp after alkaline leaching is subjected to alkaline leaching and pressure
filtration; pulp after primary cyaniding leaching is subjected to primary washing, and 99.9 percent of finished products, namely gold ingots / silver ingots are produced; the underflow after primary washing is subjected to secondary leaching operation, and leached pulp is subjected to countercurrent washing; washed underflow pulp is subjected to pressure
filtration; pulp after pulping is subjected to
cyanide residue floatation operation, and gold lead concentrate,
copper concentrate and
sulfur concentrate are respectively recovered by floatation and taken as concentrate goods for sale; and
tailings after floatation are subjected to pressure
filtration and discharged as waste
tailings. The method improves the
recovery rate of difficulty leached gold concentrate to more than 96 percent, simultaneously reduces equipment investment, shortens the leaching technological flow, and reduces the
metal overstock flow. The direct cyanidation
recovery rate of gold reaches more than 96 percent, and the comprehensive recovery rate of the gold reaches more than 98 percent, so as to reach the advanced level in the same industry in China.