混合精矿体系中方铅矿与黄铁矿浮选分离的矿浆电化学(Ⅱ)─—黄铁矿表面丁基双黄药的电化学还原动力学

来源期刊：中南大学学报(自然科学版)1995年第3期

论文作者：冯其明 陈荩 许时

文章页码：334 - 337

关键词：黄铁矿; 丁基黄药; 丁基双黄药; 浮选; 矿浆电化学; 动力学

Key words：pyrite; buthyl xanthate; buthyl dixanthogen; flotation; pulp electrochemisitry; kinetics

摘    要：双黄药是捕收剂黄药在硫化矿表面形成的典型疏水物质之一,本文采用恒电流极化法研究了黄铁矿表面丁基双黄药电化学还原的动力学行为,得到了动力学参数和动力学方程,表明其电化学还原的过电位较小(151 mV),还原反应轻易进行.

Abstract: Dixanthogen is a typical hydrophobic material formed on the sulfide surface when xan-thate is used as collector.In this paper,the kinetic character of buthyl dixanthogen electro-chemical reduction on pyrite surface has been investigated by current stepped method.Somekinetic parameters and equations were found,and the studied results showed that the elec-trochemical reduction of buthyl dixanthogen on the pyrite surface is also irreversible reaction, but compared with lead buthyl xanthate on the galena surface, it possessed lower over-potential(l51 mV)and larger exchange current density(about l000 time of Pb(BX)₂).