Effects of galvanic interaction between galena and pyrite on their flotation in the presence of butyl xanthate  

丁黄药体系中方铅矿与黄铁矿的伽伐尼作用对其浮选行为的影响（英文）

作　　者：覃文庆[1] 王兴杰[1] 马丽媛[1] 焦芬[1] 刘瑞增[1] 高科[1] 

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第9期3111-3118,共8页中国有色金属学报（英文版）

基　　金：Project(51274255)supported by the National Natural Science Foundation of China;Project supported by the Co-innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources,China

摘　　要：The effects of galvanic interaction between galena and pyrite on their flotation and electrochemical characters were studied by electrochemical,adsorption,flotation and FTIR techniques,respectively.Electrochemical tests indicate that galena is electrochemically more active than pyrite and serves as an anode in galvanic combination with pyrite.The galvanic current density from a mixture of galena and pyrite is 4 times as high as the self corrosion current density of galena,which indicates that the corrosion rate of galena is accelerated.Adsorption tests show that the adsorption of butyl xanthate on galena surface is enhanced,and affected by a combination of pyrite-galena mixtures and conditioning time.Compared with individual mineral particles,galvanic interaction reduces the floatability difference between galena and pyrite.The flotation recovery of galena decreases while that of pyrite increases when two minerals are mixed together due to the influence of galvanic interaction on the formation of hydrophilic/hydrophobic product.The FTIR results show that the formation of dixanthogen on pyrite surface is depressed due to the galvanic interaction.采用电化学、吸附、浮选和红外光谱测试技术,研究方铅矿和黄铁矿之间的电化学相互作用对其矿物浮选行为的影响。电化学实验结果表明,方铅矿的电化学活性比黄铁矿的高,在与黄铁矿组成的电偶对中为阳极,偶合体系中方铅矿的腐蚀电流密度为自腐蚀电流密度的4倍,腐蚀速率增加。吸附实验结果表明,偶合体系中丁黄药在方铅矿表面的吸附量和吸附速率增加,并且受方铅矿与黄铁矿组成比例和作用时间的影响。与单矿物浮选相比,电化学相互作用减小了方铅矿与黄铁矿的可浮性差异,电偶对中矿物间的电化学作用同时影响表面亲水性和疏水性产物的生成,从而使方铅矿的浮选回收率降低,而黄铁矿的增加。红外光谱测试结果表明,方铅矿与黄铁矿间发生电化学作用时,丁黄药在黄铁矿表面的吸附产物双黄药减少。

关 键 词：galvanic interaction GALENA PYRITE butyl xanthate FLOTATION 

分 类 号：TD923[矿业工程—选矿]