含砷废酸制备亚砷酸铜及其在铜电解液净化中的应用  

Preparation of copper arsenite from waste acid containing arsenic and its application in copper electrolyte purification

作　　者：王勇[1] 赵攀峰[1] 郑雅杰[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2007年第6期1115-1120,共6页Journal of Central South University:Science and Technology

基　　金：广东省产学研重点项目(2007A090302068);湖北大冶有色金属有限公司项目(2006KJ11)

摘　　要：利用含砷废酸制备亚砷酸铜,并将所得亚砷酸铜应用到铜电解液的净化。研究结果表明:使用NaOH溶液调节废酸pH值为6.0时,废酸中Pb,Cu,Fe和Mg杂质的去除率达到90%以上,砷保留率为89.0%;除杂后,加入CuSO4和NaOH溶液,当pH=8,n(Cu):n(As)=2:1,反应温度为20℃,反应时间为1h时,亚砷酸铜的产率达到98.2%;所得亚砷酸铜为非晶体,其中Cu与As的物质的量比为2.15;当铜电解液中加入20g/L亚砷酸铜时,铜电解液中Sb和Bi分别从0.65g/L和0.15g/L降到0.30g/L和0.07g/L,Sb和Bi去除率分别达到53.85%和53.33%。Copper arsenite prepared from waste acid containing arsenic was applied in copper electrolyte purification. The results show that the removal rates ofPb, Cu, Fe, Mg impurities are up to above 90% and the remaining rate of arsenic in the waste acid is 89.0% when pH value of waste acid is adjusted to 6.0 by NaOH solution. The optimum preparation conditions of copper arsenite are as follows： pH value of solution is 8.0, mole ratio of Cu to As is 2：1, reaction temperature is 20 ℃, and reaction time is 1 h, by adding copper sulphate and NaOH solution after removing impurities. The productivity of copper arsenite with amorphous is 98.2%. Sb concentration decreases from 0.65 g/L to 0.30 g/L, and Bi concentration decreases from 0.15 g/L to 0.07 g/L. The removal rates of Sb and Bi are 53.85% and 53.33%, respectively when copper arsenite concentration in electrolyte is 20 g/L.

关 键 词：废酸 砷 亚砷酸铜 铜电解液 净化 

分 类 号：TF803.24[冶金工程—有色金属冶金] TF803.25