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

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. 10; pp. 1993 - 1999
• Main Author: 陈建华 李玉琼 龙秋容
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2010; College of Resources and Metallurgy,Guangxi University,Nanning 530004,China%College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China%Design and Research Institute of Mining and Metallurgy,Zijin Mining Group Limited Company,Longyan 364200,China
• Subjects: frontier orbital; marmatite; organic depressant; pyrite; 分子结构; 巯基乙酸; 有机化合物; 有机抑制剂; 铁闪锌矿; 黄铁矿; organic depressant; frontier orbital; marmatite; pyrite
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(09)60407-6

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.