Abstract: The valuable elements such as copper,molybdenum are occurred in the researched copper deposit with 0.52% and 0.011%,which characterized by low grade and difficult separation.For reasonable recovery of copper,molybdenum of Cu-Mo polymetallic deposit in Yunnan Province,the benefication process experiment was conducted,based on the ore properties.Experimental results show that the grinding fineness of 57.81% -0.074 mm,collector dosage (OL-2) 80 g/t,lime dosage (TL-1) of 300 g/t in cleaning optimal conditions,the roughing experiment-process of coarse grinding-discarding tailing,regrinding of rough concentrate,once roughing,twice concentrate and three-times molybdenum cleaning has determined,by using the sodium sulfide (1 204.7 g/t) as flotation refulator,sodium fluosilicate (680.2 g/t) as combined depressant.According to the separation flotation of once roughing,four-times concentrate and once cleaning,the copper concentrate with copper grade of 25.85%,recovery of 87.729% and molybdenum grade of 0.033% has got.In addition,the molybdenum concentrate with grade of 46.35%,recovery of 76.35% has obtained.Finally,this author hold that the well comprehensive index can provides the scientific basis and technology support for effective development and utilization of copper-molybdenum ore in Pulang copper deposit.

Key words: Copper-molybdenum ore, Grinding fineness, Bulk flotation, Separation flotation