Abstract: In order to respond to the national environmental protection policy,no cyanide was used in the ore processing process,and a new type of copper-molybdenum separation inhibitor MX was used as an inhibitor during the separation of copper-molybdenum from the Sandaozhuang ores of China Molybdenum Co.,Ltd.Test study of cyanide replacement.After four cleaning,two fine scavenging,and concentrate 1 regrinding closed-circuit process,molybdenum concentrate with grade of 47.89% and recovery rate of 84.23% can be obtained with a new inhibitor MX dosage of 35g/t.The molybdenum concentrate contains 0.09% copper.The recovery rate of copper is only 1.86%,flotation separation index is well.In the process of copper-molybdenum separation,the new copper-molybdenum separation inhibitor MX replaces cyanide and reduces the harm of ore dressing to the environment.

Key words: Flotation, Separation of copper and molybdenum, Depressant