Abstract: Mineral composition of a molybdenum ore in Shaanxi province is complex,main minerals are molybdenite,galena,pyrite,and little wulfenite,among which molybdenum,lead,sulfur,gold has recovery value,molybdenum and lead mainly exists in form of sulfide.Beneficiation experiment is carried out in order to high efficiently develop and utilize the ore.The results showed that：at the grinding fineness of 68% passing 0.074 mm,through one molybdenum rough concentration,four cleaning molybdenum flotation of molybdenum rough concentrate at the grinding fineness of 93.75% passing 0.038 mm,molybdenum concentrate with molybdenum grade of 49.24% and recovery of 89.19%,lead concentrate with lead grade of 61.69% and recovery of 83.47%,and sulfur concentrate with sulfur grade of 46.32% and recovery of 68.21% were obtained separately through the process of lead concentration of one roughing-two cleaning-one scavenging,sulfur flotation of one roughing-two cleaning-two scavenging for lead tailings,all middles returns to the flow-sheet in turn.By this method,comprehensive recovery of molybdenum,lead and sulfur is well gained.

Key words: Molybdenite, Galena,Pyrite, Wulfenite, Floatation, Regrinding of rough concentrate