Abstract: In order to improve the comprehensive utilization rate of a tailings resource in Shaanxi and promote the sustainable development of the mine, flotation exploration experiments were carried out on the basis of process mineralogy research. The test results show that under the condition of grinding fineness of - 0.074 mm 77.41%, sodium sulfide as activator, 25# aerofloat and butyl xanthate as combined collector, the lead concentrate with lead grade of 51.24%, gold grade of 23.58 g/t, silver grade of 173.03 g/t, lead recovery rate of 74.31%, gold recovery rate of 69.96% and silver recovery rate of 35.85% was obtained by one roughing three cleaning two scavenging closed circuit process. The efficient recovery of valuable metals such as lead, gold and silver in the tailings was realized, and the waste of secondary resources was avoided.

Key words: tailings, flotation, process, secondary resources