Abstract:The beneficiation process of Qibaoshan lead-zinc mine successively adopts preferential flotation to select copper, lead, zinc and sulfur. Due to the change of copper minerals properties in the ore, the complex mineral intercalation relationship, it is difficult to separate copper and lead. In this paper, the copper-lead mixed flotation process is adopted, the copper metal is enriched in lead concentrate for recovery. Through the research on the mixed flotation process of copper and lead, according to the characteristics of the ore and combined with previous experiments and production practice, the cleaner collector HQ77 is used to replace the collector aniline black drug. At the same time, the process parameters are adjusted to reduce the lead grade of lead concentrate. The copper content in lead concentrate is increased from 6.39% to 8.38%, the copper recovery rate in lead concentrate is increased from 46.05% to 55.85%, and 67.3 tons of copper metal can be enriched in lead concentrate every year, The enterprise has obtained better economic and social benefits.