中文摘要：

考察偶氮类药剂对方铅矿、脆硫锑铅矿、铁闪锌矿、黄铁矿和黄铜矿的抑制作用。浮选试验结果表明：单偶氮类药剂对硫化矿无抑制作用,双偶氮药剂的抑制作用较弱或无抑制作用,三偶氮类药剂对硫化矿具有很强的抑制作用。偶氮类药剂的前线轨道能量计算及分子结构与抑制性能关系的分析表明：药剂与矿物的前线轨道能量差值可作为偶氮类药剂抑制性能的一个初步定量判据,偶氮类药剂的抑制性能取决于其分子结构。

英文摘要：

The depression effects of azo organic depressants on galena,jamesonite,marmatite,pyrite and chalcopyrite were investigated by flotation test.The flotation results indicate that single-azo compounds have no depression effect on sulphide minerals,the double-azo compounds have no or weak depression effect,and the triple-azo reagents have a good depression effect on sulfide minerals.The frontier molecular orbital energy calculation and analysis of relationship between molecular structure and azo reagents depressing effect indicate that the frontier orbital energy differences between reagents and minerals can be a preliminary quantitative analysis criterion.The depressing ability of azo reagents is determined by their molecular structures.