(1. 低品位难处理黄金资源综合利用国家重点实验室，上杭 364200；
2. 中南大学 资源加工与生物工程学院，长沙 410083)
摘 要: 利用单矿物电位调控浮选和循环伏安扫描方法研究浮选与电位的关系，考察黄铁矿的浮选电位范围(电极电位)，并绘制黄铁矿在不同环境中的φ—pH—c图。结果表明：黄铁矿与黄药作用的起始电位为0.1 V左右；电位在0.1~0.3 V之间时，反应受表面电子转移步骤控制；当电位大于0.3 V时，反应受传质过程控制。黄铁矿对黄药氧化起电催化作用。黄药在黄铁矿表面的吸附过程是整个反应的控制步骤，磨矿和搅拌均会影响捕收剂与黄铁矿的作用。
关键字: 黄铁矿；黄药；电极过程；动力学；电催化
（1. The State Key Laboratory of Comprehensive Utilization of Low-Grade Ores, Shanghang 364200, China;
2. School of Mineral Processing and Bioengineering, Central South University, Changsha 410083,）
Abstract:The relationship between the flotation and potential of single mineral was studied by potential control flotation and cyclic voltammetry method, the range of pyrite flotation potential was measured, and the φ—pH—c diagram of pyrite in different environments was drawn. The results show that when the initial potential of the reaction between pyrite and xanthate is about 0.1 V；and when the electrical potential is between 0.1 and 0.3 V, the reaction is controlled by surface electron transfer step; yet when the electrical potential is over 0.3 V, the mass transfer process is the dominate step. Pyrite can electro-catalyze the oxidation of xanthate. The adsorption of xanthate on pyrite surface is the control step of the whole reaction, and grinding and mixing may affect the reaction between pyrite and collector.
Key words: pyrite; xanthate; electrode process; kinetics; electro-catalysis
