铁闪锌矿在硫酸浸出过程中的电化学行为  

Electrochemical behavior of marmatite in sulfuric acid leaching

作　　者：徐志峰[1,2] 邱定蕃[3] 王海北[3] 

机构地区：[1]江西理工大学材料与化学工程学院 [2]北京科技大学冶金与生态学院,北京100083 [3]北京矿冶研究总院

出　　处：《北京科技大学学报》2007年第3期267-271,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金重点项目(No.50234010)

摘　　要：为研究铁闪锌矿氧化浸出机理,以人工合成铁闪锌矿的悬浮矿浆为研究对象,采用三电极体系对其在硫酸浸出过程中的电化学行为进行了研究.结果表明在铁闪锌矿浸出过程中有H2S中间产物生成;通氧、元素硫分散剂以及氯离子引入浸出体系均能明显促进铁闪锌矿的电化学氧化;随硫酸浓度升高,铁闪锌矿的电化学氧化不断加强而闪锌矿的电化学氧化受抑.与闪锌矿相比,铁闪锌矿更易发生电化学氧化.在铁闪锌矿硫酸浸出过程中,其电化学氧化作用不容忽视.In order to study the mechanism of the oxidative leaching of marmatite, the slurry of synthetic marmatite was selected as the research object. The electrochemical behavior of marmatite in sulfuric acid leaching was investigated by the three-electrode method. The experimental results proved the intermediate product of H2S in the leaching of marmatite. The results also showed that oxygen, element sulfur disperser as well as chloride ions could accelerate the electrochemical oxidation of marmatite in sulfuric acid. The electrochemical oxidation of sphalerite was retarded but that of marmatite was promoted with the increase of acidity. Marmatite was much easier to be oxidized through electrochemistry than sphalerite. The electrochemical oxidation of marmatite should not be neglected in the sulfuric acid leaching.

关 键 词：铁闪锌矿 硫酸 氧化 浸出 电化学行为 

分 类 号：TF803.21[冶金工程—有色金属冶金] TF813