关键词: 细粒铅锌矿, 矿泥, 过磨, 分级分选, 阶段磨选, 工艺优化, 高效浮选药剂, 旋流-静态微泡浮选

Abstract: Difficulty in trapping microfine lead-zinc ore during flotation is the key problem for low recovery of the fine grained lead-zinc ore.In order to provide technical basis for high efficient recovery of fine lead-zinc ore at a low cost，the process，equipment，and reagents used in fine lead-zinc ore beneficiation were analyzed.Problems and measures existing in recover fine lead-zinc ore were put forward.Suggestions for development direction of fine lead-zinc ore were pointed out.The analysis results show that the high efficient recovery depends mainly on development of new high efficient separation agents，expansion of the beneficiation methods，optimization of the grinding and separation processes，and upsize and efficiency of floatation facilities.On the novel high efficient separation agents，relying on theories of surface and colloid chemistry，quantum chemistry and the computer-aided molecular design technique to develop special reagents which can enhance surface hydrophobicity of superfine lead-zinc minerals would be the research direction.For slime，which has poor flotation behavior，leaching process with low cost，high efficiency，and harmless to environment should be considered，through more separation methods combination to solve the problems of long single flotation process，large investment and high operation costs.For mosaic fine grained lead-zinc ore with easily ground and sliming，the appropriate grinding fineness and classification separation process should be determined，and also stage grinding and stage separation technology should be considered to decrease the overgrinding.About low recovery by using traditional flotation equipment to process fine-superfine lead-zinc minerals，the application and optimization of the high efficient flotation equipment，such as Cyclonic Staticmicro Bubble Flotation Column，should be vigorously promoted.

Key words: Fine grained lead-zinc mineral, Slime, Over-grinding, Classification and separation, Stage grinding and stage separation technology, Process optimization, High efficiency flotation reagent, Cyclonic-static micro bubble flotation