Mechanism of influence of chloride ions on electrogenerative leaching of sulfide minerals^①

来源期刊：中南大学学报(英文版)2006年第4期

论文作者：王少芬 方正

文章页码：379 - 382

Key words：chloride ion; electrogenerative leaching; mechanism; sulfide minerals

Abstract: A dual cell system was used to study the influence of chloride ions on the electrogenerative leaching of sulfide minerals. The results show that the influences of chloride ions on a series of electrogenerative leaching system are similar, and chlorine ion is involved in the electrogenerative leaching process of sulfide minerals directly.The output power increases with the increase of Cl^- concentration. The influence on the electrogenerative leaching rate decreases when the Cl^- concentration reaches a certain value. The mechanisms of anodic reaction are deduced based on the reasonable hypothesis, and kinetic equations with respect to chlorine ions for each sulfide mineral are obtained. The kinetic equations show that when concentration of Cl^- is relatively low, the electrogenerative leaching rates are predicted to have 2/5,2/7,1/3and1/3order dependence on Cl^- concentration for chalcopyrite concentrate,nickel concentrate, sphalerite and galena. As concentration of Cl^- increases, the correlative dependence of electro generative leaching rate on concentration of Cl^- becomes weak.

基金信息：the National Natural Science Foundation of China