Flotation and electrochemical behaviors of chalcopyrite and pyrite in the presence of N-propyl-N′-ethoxycarbonyl thiourea  

N-丙基-N′-乙氧羰基硫脲对黄铜矿和黄铁矿的浮选及其电化学行为（英文）

作　　者：Shuang-ke LI Guo-hua GU Guan-zhou QIU Zhi-xiang CHEN 李双棵;顾帼华;邱冠周;陈志翔(中南大学资源加工与生物工程学院,长沙410083)

机构地区：School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2018年第6期1241-1247,共7页中国有色金属学报（英文版）

基　　金：Project(51374249)supported by the National Natural Science Foundation of China

摘　　要：The characteristics of N-propyl-N′-ethoxycarbonyl thiourea（PECTU） were studied in the flotation experiments of chalcopyrite and pyrite compared with butyl xanthate（BX）. The interaction mechanism between mineral and PECTU was investigated according to zeta potential and electrochemistry measurements in the presence of PECTU. The results proved that PECTU performed a stronger ability to capture chalcopyrite and a better selectivity against pyrite. The zeta potential of chalcopyrite was positively shifted after interacting with PECTU, which indicated that the collector PECTU was obviously adsorbed on chalcopyrite surface. The cyclic voltammetry and Tafel curves results indicated that the oxidation and corrosion rates of chalcopyrite surface were limited in the presence of PECTU, while the effect of PECTU on pyrite in weak alkaline solution can be neglected basically according to the results of zeta potential and electrochemical tests.通过浮选试验,比较N-丙基-N′-乙氧羰基硫脲(PECTU)和丁基黄药(BX)对黄铜矿和黄铁矿浮选行为的影响,并利用动电位测试和电化学方法研究乙氧羰基硫脲与黄铜矿和黄铁矿的作用机理。浮选试验结果表明,相对于丁基黄药,乙氧羰基硫脲表现出对黄铜矿更强的捕收能力以及更好的选择性。与PECTU作用后,黄铜矿表面zeta电位向正方向移动,证明PECTU在黄铜矿表面发生了吸附。循环伏安曲线和塔菲尔测试结果表明,PECTU与黄铜矿表面相互作用后,吸附在黄铜矿电极表面的PECTU阻碍了黄铜矿自身的氧化和腐蚀。动电位和电化学测试结果表明,在弱碱性条件下,PECTU与黄铁矿几乎无相互作用。

关 键 词：CHALCOPYRITE PYRITE FLOTATION N-propyl-N＇-ethoxycarbonyl thiourea electrochemical behavior 

分 类 号：TD923[矿业工程—选矿] TD95