中文摘要：

考察了铁闪锌矿和毒砂的浮选行为以及Cu^2＋和有机抑制剂PALA对它们可浮性的影响。结果表明，以丁黄药作捕收剂，2^#油为起泡剂，铁闪锌矿和毒砂具有相似的可浮性。硫酸铜可大大改善铁闪锌矿的可浮性，而Cu^2＋对毒砂的活化作用较小。PALA对铁闪锌矿和毒砂在不同矿浆pH值下都有一定程度的抑制能力，PALA对毒砂的抑制能力大于对铁闪锌矿的抑制能力。Cu^2＋和PALA的共同作用能使铁闪锌矿和毒砂得到有效的分离。人工混合矿浮选分离试验结果表明，以丁黄药为捕收剂、硫酸铜为活化剂、PALA为抑制剂，2^#油为起泡剂，铁闪锌矿和毒砂得到有效的分离，泡沫精矿产品中含锌40．40％，锌回收率达95．41％，槽内产品含砷40．33％，砷回收率达85．27％。通过动电位分析了药剂在矿物表面的作用机理。

英文摘要：

The flotation behavior of marmatite and arsenopyrite and the effects of the Cu^2＋ ion or the PALA organic depressant on their floatabilities are studied. It indicated that marmatite and arsenopyrite have similar floatabilities in the presence of butyl-xanthogenate as collector and 2^# oil as frother. Copper sulfate can greatly improve the floatability of marmatite, while Cu^2＋ has less activation effect on arsenopyrite. PALA can depress marmatite and arsenopyrite, and the depression effect of PALA on arsenopyrite is larger than on mamatite. Mamatite and arsenopyrite can be effectively separated under the co-action of Cu^2＋ and PALA. The results of the floatation test of the artificial mixed ore of marmatite and arsenopyrite demonstrated that the effective separation of the two minerals was achieved, with 40.40% zinc in the foam concentrates and zinc recovery of 95.41%. The product in the cell is arsenopyrite, which contain 40.33% arsenic and its recovery is 85.27%. The mechanisms of the reagents on the mineral surface are analyzed by using zeta potential.