铜阳极泥预处理富集金银的研究  

Pretreatment of copper anode slime for concentrating gold and silver

作　　者：郑雅杰[1] 汪蓓[1,2] 史建远 孙召明[1] 刘昭成[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083 [2]大冶有色金属有限公司,湖北黄石435002

出　　处：《中南大学学报（自然科学版）》2010年第3期865-870,共6页Journal of Central South University:Science and Technology

基　　金：2007年广东省教育部产学研重大项目(2007A090302068)

摘　　要：对铜阳极泥预处理富集金银进行研究。先经硫酸预浸脱铜,当反应温度为353K,H2SO4与Cu的物质的量比n(H2SO4):n(Cu)为1.5,液固比为3:1,反应时间为1.5h时,铜浸出率达到90%;脱铜阳极泥再与碳酸钠进行球磨转化后硝酸浸出脱铅;当球磨时间为3h,Na2CO3与Pb的物质的量比即n(Na2CO3:n(Pb)为2.5,液固比为2:1,球料比为8:1,HNO3与Pb的物质的量比即n(HNO3):n(Pb)为6.0,浸出时间为0.5h,浸出温度为296K时,铅浸出率为69.5%。研究结果表明:经上述预处理后阳极泥金、银含量分别从0.152%和7.81%增加到0.31%和13.7%,阳极泥量减少一半,大大提高了回转窑生产能力,并减少了SO2的排放量。The pretreatment of copper anode slime for concentrating gold and silver was studied. The leaching rate of copper is 90% after the sulfuric acid leaching when leaching temperature is 353 K,n（H2SO4）：n（Cu） is 1.5,liquid-solid ratio is 3：1 and reaction time is 1.5 h. Then the decopper anode slime is milled with sodium carbonate and leached by nitric acid solution. The leaching rate of lead is 69.5% when the milling conditions are as follows：milling time is 3 h,n（Na2CO3）：n（Pb） is 2.5,liquid-solid ratio is 2：1,ball-to-powder mass ratio is 8：1 and the leaching conditions are as follows：n（HNO3）：n（Pb） is 6.0,leaching time is 0.5 h and leaching temperature is 296 K. After the pretreatment process,the results show that the contents of gold and silver increase from 0.152% and 7.81% to 0.31% and 13.7%,respectively. The amount of anode slime is reduced by half,the production capacity of rotary kiln is enhanced greatly and the emission of SO2 is decreased.

关 键 词：铜阳极泥 预处理 铜 铅 浸出 

分 类 号：TF04[冶金工程—冶金物理化学]