高银铋阳极泥浸出工艺研究

来源期刊：有色金属科学与工程2013年第1期

论文作者：何静 郭瑞 蓝明艳 王灿 鲁君乐

文章页码：20 - 25

关键词：阳极泥；浸出；环境友好

Key words：anode slime; leaching; environmentally friendly

摘    要：某厂高银铋阳极泥产粗铋及综合回收有价金属，工艺采用两段浸出法处理此阳极泥，第１段硫酸浸出铜，第２段盐酸浸出铋.分别考察了浸出温度、时间、液固比（质量比）、酸量及氧化剂用量对浸出率的影响.铜的浸出率（液计）96 %以上，铋、锑的浸出率（渣计）均在99 %以上，铅、银富集于第２段浸出渣中，铅、银渣含Pb 26.63 %左右，含Ag 36.77 %左右，铅和银的直收率高，分别为97.82 %及98.93 %.浸出过程为串级联动循环浸出，洗酸洗水均返回下一次浸出，大大地减少了废水量，环境友好.

Abstract: In order to produce crude bismuth and comprehensively recovery of valuable metals from anode slime with high silver and bismuth ,The process is Two-stage leaching. The first stage is leaching of copper with sulfuric acid and the second stage is leaching of bismuth with hydrochloric acid. Studied on the relationship between the Leaching rate and the leaching temperature, time, ratio of liquid to solid(Quality), dosage of acid and oxidant.The leaching rate(Liquid) of copper is above 96 %,and The leaching rate(Slag) of bismuth and antimony are all above 99 %.The lead and silver are enriched in the second stage leaching slag,which containing Pb about 26.63 %,Ag about 36.77 %,the direct yield of Pb and Ag are 97.82 % and 98.93 % respectively.The process is cycle leaching, washing water and washing acid are returned to the next leaching, which greatly reduced the amount of wastewater, and good for environmental protection.