Utilization of polysaccharides as depressants for the flotation separation of copper/lead concentrate  

作　　者：Qin Wenqing Wei Qian Jiao Fen Yang Congren Liu Ruizeng Wang Peipei Ke Lifang 

机构地区：[1]State Key Laboratory of Comprehensive Utilization of Low-Grade Ores [2]School of Mineral Processing and Bio-Engineering, Central South University

出　　处：《International Journal of Mining Science and Technology》2013年第2期191-198,共8页矿业科学技术学报（英文版）

基　　金：Financial support from the Foundation of the State Key Laboratory of Comprehensive Utilization of Low-Grade Ores (Zijin Mining Group Co. Ltd.);the National Basic Research Program of China(No. 2010CB630905)

摘　　要：The interaction mechanism between dextrin and minerals has been investigated through micro-flotation, adsorption density measurements, Fourier transform infrared ray (FTIR) spectroscopic studies and dissolution tests. Dextrin shows a good depressing action towards galena but not chalcopyrite. FTIR spectroscopic studies indicate that dextrin chemically adsorbed on galena surface in alkaline pH range. Dissolution tests confirm leaching action of metal ions from chalcopyrite and galena surfaces, and dextrin-lead ion interaction. Adsorption measurements present that the higher adsorption density of O-isopropyl-N-ethyl thionocarbamate (IPETC) onto chalcopyrite than that onto galena, and IPETC adsorbed on galena decrease with increasing dextrin concentrations in the presence of dextrin, attesting the flotation results.The interaction mechanism between dextrin and minerals has been investigated through micro-flotation, adsorption density measurements, Fourier transform infrared ray (FTIR) spectroscopic studies and dissolution tests. Dextrin shows a good depressing action towards galena but not chalcopyrite. FTIR spectroscopic studies indicate that dextrin chemically adsorbed on galena surface in alkaline pH range. Dissolution tests confirm leaching action of metal ions from chalcopyrite and galena surfaces, and dextrin-lead ion interaction. Adsorption measurements present that the higher adsorption density of O-isopropyl-N-ethyl thionocarbamate (IPETC) onto chalcopyrite than that onto galena, and IPETC adsorbed on galena decrease with increasing dextrin concentrations in the presence of dextrin, attesting the flotation results.

关 键 词：Polysaccharides Chalcopyrite Galena Depressant Depressing mechanism 

分 类 号：TD952[矿业工程—选矿] TD923.1