毒重石酸解制钡盐过程中除硅的实验研究  

Study on silicon removing in witherite pickling to prepare barium salt

作　　者：叶宇玲[1] 杨勇[1] 余林春[1] 杨虎[1] 

机构地区：[1]四川理工学院材料与化学工程学院,四川自贡643000

出　　处：《无机盐工业》2014年第1期35-37,共3页Inorganic Chemicals Industry

摘　　要：对盐酸浸取毒重石后的酸解液中硅的去除情况进行了研究。考察了不同除硅剂、除硅剂的加入量、不同pH、陈化时间、除硅温度等因素对硅去除率的影响。结果表明：在50℃下加入三氯化铝脱硅，选择m（三氯化铝）：m（二氧化硅）为1．0，维持pH在7-8的条件下，陈化30rain，硅的去除率可以达到80％以上，钡的损失率小于1．4％。该方法简单易行，且通过除硅处理后，对酸解液进行结晶更易制得高纯钡盐，可以降低结晶过程中工艺管道的清洗频率，对工业化生产起到积极作用。Witherite was leached by hydrochloric acid, and the experiment of removing silicon was studied in the witherite pickling solution.The influences of different kinds of silicon removing agent and the addition amount,pH,aging time,and temperature etc. on the silicon removing effect were investigated.Results indicated： adding aluminum chloride under the tem- perature of 50 ℃, m （A1C13）：m （Si02）= 1.0, keeping the pH between 7-8, and 30 min aging time the desilication rate could reach above 80%, and the barium loss rate was under 1.4%.The operation could be easily controlled, and the quality of bari- um salt could be improved and the frequency of cleaning pipelines in the process of crystallization could also be reduced.This operation will play a positive role in the industrial production.

关 键 词：毒重石 三氯化铝 除硅 

分 类 号：TQ127.2[化学工程—无机化工]