关键词: 磁铁矿, 磁黄铁矿, 黄铁矿, 黄铜矿, 优先浮选, 活化, 弱磁选, 反浮选

Abstract: A low-copper and high-sulfur magnetite ore in Anhui is polymetallic ore with complex embedded relationship.In order to exploit and utilize the ore，the beneficiation process based on the principle of preferential flotation of copper，activating flotation of sulfur，low intensity magnetic separation of iron，desulfurizing by reverse flotation of iron concentrates was tested.The raw ore consisting of 46.62% iron，0.32% copper，20.56% sulfur was treated by four-stage process of copper flotation of one roughing-two cleaning-one scavenging，sulfur flotation of one roughing-one cleaning-two scavenging，iron concentration of one low intensity magnetic separation，and desulfurizing of iron concentrates by reverse flotation of one roughing-one cleaning.Finally，copper concentrate with Cu grade of 17.09% and recovery of 78.64%，iron concentrate with Fe 67.35%，S 0.28% and iron recovery of 41.16%，sulfur concentrate with S 43.69% and recovery of 88.79% were obtained separately.The test conclusion can be used as the basis for designing of the dressing plant.

Key words: Magnetite, Pyrrhotite, Pyrite, Chalcopyrite, Preferential flotation, Activation, Low intensity magnetic separation, Reverse flotation