Abstract: There is 2.85% copper in an oxide copper ore，with an oxidation rate of 87.65%，copper mainly exists in form of malachite，follows by chrysocolla and chalcocite.In order to provide technical basis for the development and utilization of the ore，beneficiation test by sulfide flotation method was conducted.Experimental results show that via grinding to -0.074 mm 60.41%,using amyl xanthate as collector，ethylenediamine sulfate and ammonium bicarbonate combination reagent (with dosage ration 1〖DK（〗∶〖DK）〗1) as activator,two roughingtwo cleaningtwo scavenging closed flotation process,copper concentrate with grade of 29.46% and recovery of 82.16% were eventually obtained.

Key words: Oxide copper ore, Activator, Sulfide flotation