Abstract:In order to solve the problem that the gold recovery of a copper-cobalt containing gold polymetallic ore is relatively low through the copper preferential-gold-cobalt mixed flotation test process, after multi-element analysis, particle size screening, determination of metal distribution and process mineralogy examination of flotation tailings. It is found that the coarse particles contain a certain amount of gold and some are partially oxidized at the same time, and re-grinding and re-separation and cyanidation leaching are carried out to recover gold. The recovery of gold in the gold cobalt concentrate obtained by regrinding and regrinding is 6.93%. After cyanidation leaching of regrinding and regrinding tailings, the gold grade of the leached residue is 0.33g/t, the leaching rate of gold operation is 80.0%, and the gold recovery rate of the raw ore is 19.04%; The total gold recovery rate obtained by the combined process of "copper first-gold-cobalt mixed flotation-tailings regrinding and regrinding-tailings carbon leaching" is 95.38%.