黄原酸盐介质中黄铁矿的电化学行为(1)双黄药在其表面形成的电极过程  

ELECTROCHEMICAL BEHAVIOR OF PYRITE IN THE PRENSENCE OF XANTHATE SOLUTION I. ELECTRODEPOSIT OF DIXANTHOGEN AT SURFACE OF PYRITE ELECTRODE

作　　者：覃文庆[1] 邱冠周[1] 徐竞[1] 王淀佐[1] 

机构地区：[1]中南工业大学矿物工程系,长沙41183

出　　处：《有色金属》1999年第3期26-29,共4页Nonferrous Metals

摘　　要：采用循环伏安扫描法、恒电流阶跃法研究了黄铁矿电极在丁基发原酸钾溶液体系中的电化学行为，根据电化学试验结果可以判定，黄药在黄铁矿电极表面形成双黄药；双黄药的形成是分步进行的，首先会发生黄原酸根离子的电化学吸附，然后再氧化成双黄药．由恒电流阶跃试验结果可以建立双黄药形成的氧化动力学方程，由此方程可以判定黄铁矿表面双黄药形成速率的大小．Electrochemical behavior of Pyrite in the presence of xanthate solution is shown in this paper.Cycle voltammogram scan, galvanostatic and rotating-disc electrodes measurements were used to study theelectrodeposit proes of dixanthogen on the surface of pyrite electrode. Experimental results demonstrate thatthe first step of electrodposit is electrochemical adsorption of xanthate ion, and then one xanthogenic ionadsorbed integrates itself with another free xanthate ion and forms dixanthogen . Using galvanostatic technique, the electrochemical dynamics equation of the electrodeposit process of dixanthogen on the surface ofpyrite electrode was set up. It can quantitatively describe the oxidation process of xanthate on pyrite surface.

关 键 词：黄铁矿 黄原酸钾 浮选 电化学 选矿 

分 类 号：TD951.1[矿业工程—选矿]