Produced in the hydrothermal vein chalcopyrite copper deposits from the dry grinding after flotation, only a small amount of flotation agent as the only blowing agent, the five samples were laboratory flotation tests, are given It was a success. As a result of the test, the flotation agent alone is simpler and more effective than conventional flotation (using a regulator, a collector , a filler). Flotation under natural pH conditions, copper recovery and concentrate grade have improved. The collected from the Peruvian Andes a copper sample, symbiotic pyrrhotite, pyrite and arsenopyrite small amount. Only use polypropylene dilute methyl ether 250 g / ton (added in two stages in the rough selection), compared with the conventional addition of lime, sodium cyanide, Z-200, etc., the former crude copper concentrate recovery rate of 98.8%, after The rate was 93.9%. Under the same three selection conditions, the final concentrate copper recovery rate was 91.0% for the former, 71.9% for the latter (small test), and the copper grade of the former three selected concentrates was >25%, while the conventional method The copper grade is as low as 19.4%. The test confirmed that the pyrrhotite, pyrite and arsenopyrite in the coarse concentrate were actually lower than the flotation speed of the chalcopyrite when the foaming agent was used alone. Sulfide ore belonging to the primary deposit is suitable for this flotation process. 
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