铜阳极泥碱性加压氧化浸出渣的硫酸浸出过程  

Sulfuric acid leaching of residue from copper anode slime pretreated by alkaline oxidative pressure leaching

作　　者：刘伟锋[1,2] 刘又年[1] 杨天足[2] 陈霖[2] 张杜超[2] 王安[2] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083 [2]中南大学冶金与环境学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2013年第6期2192-2199,共8页Journal of Central South University:Science and Technology

基　　金：中国博士后科学基金资助项目(2013M531808);中南大学博士后基金资助项目(110768);2009年湖南省科技重大专项(2009FJ1007)

摘　　要：针对铜阳极泥碱性加压氧化浸出渣开展硫酸浸出过程研究,考察硫酸浓度、温度、时间、液固比、搅拌速度和氧化方式等因素对浸出渣渣率和金属浸出率的影响。研究结果表明:金属浸出率随硫酸浓度的增加而提高,银的溶解尤为明显;硫酸浸出渣中未溶解的铜主要以单质存在,采用空气氧化方式可以提高铜的浸出率;在最佳条件即硫酸浓度为2.7 mol/L,温度为85℃,液固比为5:1,时间为2 h,空气压力为0.1-0.2 MPa和搅拌速度为300 r/min下,硫酸浸出渣率为60.0%,Cu和Te的浸出率分别为97.65%和77.53%,Ag和Sb的浸出率分别为8.95%和2.0%。The process of sulfuric acid leaching was adopted to treat the residue from copper anode slime pretreated by alkaline pressure oxidation leaching. The effects of many factors such as sulfitric acid concentration, temperature, time, liquid-solid ratio, stirring speed and oxidation type in sulfuric acid leaching on residue yield and leaching ratio were investigated. The results show that leaching ratios of copper, tellurium and silver increase with the increase of the concemration of sulfuric acid, especially for the leaching ratio of silver. The phase of undissolved copper in the leaching residue exists mainly in the elemental, and the leaching ratio of copper can be enhanced with air. The optimum conditions of sulfuric acid leaching are determined. Under the optimum conditions of the sulfuric acid concentration 2.7 mol/L, temperature 85 ℃, liquid-solid ratio 5：1, time 2 h, stirring speed 300 r/min and air pressure 0.1-0.2 MPa, the residue yield is 60%. The leaching rates of copper, tellurium, silver and nickel are 97.65%, 77.53%, 8.95% and 5.85%, respectively.

关 键 词：阳极泥 碱性加压氧化浸出 硫酸浸出 铜 

分 类 号：TF111[冶金工程—冶金物理化学]