作　　者： ; ;

机构地区： 中南工业大学矿物工程系

出　　处： 《中南矿冶学院学报》 1992年第5期520-525,共6页

摘　　要： 选用双氧水作抑制剂,实现了人工和现厂的铜-铅混合精矿的选择性浮选分离。通过矿浆电位测量和循环伏安曲线测定,详细地研究了双氧水的抑制机理。研究结果表明,双氧水能够氧化分解方铅矿表面的乙基黄原酸铅,但未能氧化黄铜矿表面的双黄药,由此造成双氧水作用的选择性。 The flotation separation of chalcopyrite from galena in bulk concentrateswas achieved using hydrogen peroxide (H_2O_2) as modifier. The collector-inducedflotation of galena was depressed in the presence of H_2O_2, but chalcopyrite floatedwell. The depression mechanism of galena flotation was investigated through themeasurement of potential and cyclic voltammetry. The results have shown thatlead ethyl xanthate was responsible for galena flotation and can be furtheroxidized and decomposed at higher potentials controlled by H_2O_2 and potentiostat.The oxidation and composition of PbX_2 resulted in a change of galena surfacefrom hydrophobic to hydrophilic condition. On the other hand, dixanthogen wasresponsible for chalcopyrite flotation and was stable at higher potentials. Thedifference of electrochemical stability of PbX_2 and X_2 resulted in the flotationof chalcopyrite from galena.

关 键 词： 黄铜矿 方铅矿 浮游选矿 电化学

领　　域： [矿业工程]