本文研究了黄铁矿、黄铜矿和方铅矿在加和不加捕收剂情况下,矿浆电位对这些矿物的浮选影响。试验研究了氰化物和铬酸盐对浮选和矿浆电位的影响。讨论了在黄药存在条件下捕收和抑制的机理。黄铁矿和黄铜矿在无捕收剂时是可浮的。而这三种矿物用Na_2S还原时,都是可浮的。黄铁矿和黄铜矿在加捕收剂和不加捕收剂时可浮性都发生在同一电位区域。而方铅矿在加捕收剂时的可浮性是在更低的电位区域。在不加铬酸盐的条件下,氰化物的抑制作用与电位有关。 In this paper, the effects of pulp potential on flotation of these minerals in pyrite, chalcopyrite and galena with or without added collector were studied. The effects of cyanide and chromate on flotation and pulp potential were studied. The mechanism of catching and inhibiting in the presence of xanthate was discussed. Pyrite and chalcopyrite are floatable without collector. When these three minerals are reduced with Na_2S, they are floatable. Pyrite and chalcopyrite both occur in the same potential region with and without buoyant. Galena flotation in the collector is in the lower potential area. In the absence of chromate, the inhibition of cyanide and potential.