Molecular structures and activity of organic depressants for marmatite,jamesonite and pyrite flotation  

作　　者：陈建华 李玉琼 龙秋容 

机构地区：[1]College of Resources and Metallurgy,Guangxi University [2]College of Chemistry and Chemical Engineering,Guangxi University [3]Design and Research Institute of Mining and Metallurgy,Zijin Mining Group Limited Company

出　　处：《Transactions of Nonferrous Metals Society of China》2010年第10期1993-1999,共7页中国有色金属学报（英文版）

基　　金：Project(50864001) supported by the National Natural Science Foundation of China;Project(0991082) supported by Guangxi Natural Science Foundation, China

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.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.

关 键 词：MARMATITE PYRITE organic depressant frontier orbital 

分 类 号：TD95[矿业工程—选矿]