高砷烟道灰预处理水浸液中锌砷分离  

Separation of Zn with As from Water Leaching Solution of High Arsenic Content Flue Dust

作　　者：王倩倩[1,2] 刘敬崇 朱媛媛[2] 郭九吉[2] 赵伟[2] 张绘[2] 于萍[1] 齐涛[2] 

机构地区：[1]山东大学化学与化工学院,山东济南250061 [2]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190

出　　处：《过程工程学报》2014年第4期599-604,共6页The Chinese Journal of Process Engineering

基　　金：基金委杰出青年基金资助项目(编号:51125018);科技部科技支撑基金资助项目(编号:2014BAC03B00)

摘　　要：对经热水浸出的高砷烟道灰水浸液进行锌砷分离,基于单独使用Fe2(SO4)3和CaO除砷的实验结果,提出了Fe2(SO4)3-CaO耦合分离锌砷工艺.结果表明,在溶液pH=2、摩尔比H2O2/As3+1.3:1,Fe3+/As5+1:1.5,Ca2+/As5+1.5:1及反应温度70℃、反应时间1.5 h的条件下,砷脱除率超过80%,锌没有损失,实现了锌砷高效分离.The separation process of Zn with As from the water leaching solution of high arsenic content flue dust was studied. Based on the results of ferric sulfate route and calcium oxide route, a ferric sulfate-calcium oxide coupled separation route of Zn with As was proposed. The results show that under the optimal conditions of pH value 2, molar ratio of H2O2/As3＋ 1.3：1, Fe3＋/As5＋ 1：1.5, Ca2＋/As5＋ 1.5：1, reaction temperature 70℃ and time 1.5 h, the As removal rate reaches more than 80% while the loss of Zn nearly is zero. The effective separation of Zn with As has been achieved in this new route.

关 键 词：烟道灰 锌 砷 分离 水浸液 

分 类 号：X754[环境科学与工程—环境工程]