Abstract: A lead-zinc mine in Guangdong province belongs to the implicit crystalline lead-zinc deposit, with high lead oxidation rate, lead and zinc are closely associated with each other. In order to develop and utilize the ore, experimental study was conducted. The results show that with the grinding fineness of 70% passing 200 mesh, using lead and zinc simultaneous flotation of one roughing, one cleaning, one scavenging, and one roughing, two cleaning, one scavenging for zinc beneficiation, middles back to the flowsheet in turn, lead and zinc mixed concentrate with lead grade and recovery of 29.79% and 90.78%, and zinc grade and recovery of 32.43% and 36.60%, zinc concentrate with zinc grade of 56.91%, recovery of 61.41%, total lead and zinc recovery of 90.78% and 98.01% was achieved.

Key words: Lead-zinc ore, Simultaneous flotation, Mixed concentrate, Zinc flotation