关键词: 铜钼混合精矿　, 铜钼分离　, 高梯度磁选　, 磁-浮联合工艺

Abstract: To address the problems of low separation efficiency,high reagent cost,and severe environmental pollution in the conventional "depressing copper and floating molybdenum" process caused by the similar floatability of chalcopyrite and molybdenite,this study proposes a combined process of "high-gradient magnetic separation pre-concentration followed by flota tion separation" based on the significant magnetic susceptibility difference between the two minerals.The feed material was a copper-molybdenum mixed concentrate from a concentrator in Luanchuan,Henan Province,containing 0.39% Cu and 6.94% Mo.Through process mineralogy analysis,single-factor magnetic separation tests,and combined magnetic-flotation circuit tests, the optimal process parameters were determined,and a full closed-circuit test was conducted.The results show that under the optimal conditions of feed concentration 20%,background magnetic induction intensity 1.6 T,pulsating frequency 100 r/min, and water flow rate 2.0 L/min,a single magnetic separation step yields a magnetic product with Cu grade of 1.03% and Cu re covery of 78.65%,and a non-magnetic product with Mo grade of 7.53% and Mo recovery of 79.62%,effectively achieving pre separation of copper and molybdenum minerals.The closed-circuit test finally produces a copper concentrate with Cu grade of 7.21% and Cu recovery of 52.61%,as well as a molybdenum concentrate with Mo grade of 47.67%,Mo recovery of 86.56%, and Cu content as low as 0.11%.The combined process significantly reduces the reagent consumption in the subsequent flota tion stages,achieves efficient separation of copper and molybdenum,and provides a feasible technical route for the green bene ficiation of finely disseminated copper-molybdenum associated ores.