Abstract: Study of technical condition of flotation technology was done on a gold-bearing polymetallic sulphide ore in Gansu Province, the test results indicated, prior lead and gold beneficiation by adopted once roughing twice regrade three times scavenging and middling ore sequence return process, lead concentrate with grade and recovery rate of lead was 40.86% and 93.13% , gold-bearing 35.51 g/t and recovery rate of gold 36.74% was obtained finally, and gold concentrate with grade and operation recovery rate of gold 8.94 g/t and 93.48% was obtained too, general recovery rate of gold was 95.88%.

Key words: Gold-bearing polymetallic sulphide ore, Lead flotation preferential, Regrinding and reconcentration