黄药在黄铁矿及毒砂表面的氧化动力学  

OXIDATION KINETICS OF XANTHATE AT THE SURFACE OF PYRITE AND ARSENOPYRITE

作　　者：杨家红[1] 陈万雄[1] 

机构地区：[1]中南工业大学有色冶金系,中南工业大学矿物工程系

出　　处：《中南工业大学学报》1995年第5期600-604,共5页Journal of Central South University of Technology(Natural Science)

基　　金：国家"七五"科技攻关计划基金

摘　　要：采用旋转圆盘电极及多种电化学测试方法研究了黄药在黄铁矿和毒砂表面的氧化动力学。结果表明，在ｐＨ≥９．８的溶液中，首先发生黄药的电化学吸附然后化学吸附的一个黄原酸离子与另一个游离的黄原酸离子结合形成双黄药，反应电子数ｅ１＝ｅ２＝１．黄铁矿对黄药的氧化有电催化作用，采用恒电流阶跃法导出了黄药在这２种矿物表面氧化生成双黄药的动力学方程，可对其氧化过程进行定量描述。Kinetics of xanthate oxidation at the surface of pyrite and arsenopyrite was studied by using rotating-disc electrodes and various electrochemicaI test measures. Experimental re-sults demonstrate that the first step of oxidation is electrochemical adsorption of xanthate,and then one xanthogenic ion adsorbed integrates itself with another free xanthogenic ion andform dixanthogen in the solution of pH>9.8, the number of reaction electrons ei =e2=1.Pyrite has electrochemical catalyticaction on the oxidation of xanthate。 Kinetic equation ofxanthate oxidation and the producing of dixanthogen at the surfaces of two minerals was de-duced using the measure of potentiostatic step. The equation can quantitatively describe theoxidation processes.

关 键 词：电化学 黄铁矿 毒砂 黄药 氧化动力学 选矿 

分 类 号：TD951.1[矿业工程—选矿] TD923.1