Abstract: The average grade of Ganluo copper ore is 1.96%,the content of harmful elements are extremely low.The natural type of ore is single,malachite is the main metal mineral.In order to realize the effective recovery and utilization of the copper ore,the bulk flotation process was used to beneficiation test.The result show that it could get copper grade of 24.07% and 77.12% recovery copper concentrate at grinding fineness of -0.074 mm accounted for 77%,under two roughing,four cleaning and two scavenging closed circuit bulk flotation process,with sodium sulfide dosage 3 000 g/t,the combined collector(butyl xanthate+butyl ammonium+hydroximic acid) dosage 120+60+30 g/t,but it's hard to recycle the malachite lost in tailings,which is mixed with iron,filling in cracks or micro-cracks,with finer grain size,the mineral liberation is very difficult,so it is difficult to be recovered.

Key words: Copper oxide, Bulk flotation, Activator