中文摘要：

十种器官的镇静剂被用来在铁闪锌矿和黄铁矿上调查压抑的表演。仅仅与单身者一起的有机化合物氢氧根组织的筹款结果表演(? 哦) ， carboxyl (? COOH ) 或氨基(? NH2 ) 在压抑铁闪锌矿，脆硫锑铅矿和黄铁矿在分子是无效的。这些功能的组的联合不能仍然提高器官的镇静剂的压抑的能力。包含减少的功能的组的 thioglycollic 酸(? 嘘) 为铁闪锌矿和黄铁矿有好压抑表演。在分子的苯戒指的存在能提高压抑的表演。功能的组 electronegativity，吸水恐水病的索引和器官的镇静剂轨道的边疆被计算，并且为到硫醚矿物质的器官的镇静剂的压抑的效果的标准被建议。

英文摘要：

Ten kinds of organic depressants were used to investigate the depressing performance on marmatite and pyrite.Flotation results show that the organic compounds only with single group of hydroxyl（-OH）,carboxyl（-COOH） or amino（-NH2） in molecule are ineffective in depressing marmatite,jamesonite and pyrite.The combinations of these functional groups still cannot enhance the depressing ability of organic depressant.The thioglycollic acid containing reductive functional group（-SH） has a good depressing performance for marmatite and pyrite.The presence of benzene ring in molecule can enhance the depressing performance.The functional group electronegativity,hydrophilic-hydrophobic indexes and frontier orbital of organic depressants were calculated,and the criterion for the depressing effect of organic depressants to sulphide minerals was proposed.