仲钨酸铵结晶母液深度脱除氨氮的研究  

Study on the Removal of Ammonia from APT Crystal Mother Liquor

作　　者：万林生[1] 龚丹丹[1] 付赞辉[1] 李红超[1] 孙丽[1] 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《稀有金属与硬质合金》2011年第4期4-7,共4页Rare Metals and Cemented Carbides

摘　　要：采用添加碱性浓钨酸钠料液转化-镁盐沉淀深度脱氨工艺,使仲钨酸铵结晶母液脱除氨氮。研究结果表明,经此处理溶液中的氨氮含量可除至0.042g/L,氨氮的除去率达98.88%。将所得钨酸钠溶液稀释10倍用于配制交前液进行离子交换,交后液中的氨氮浓度小于0.000 5%,可达国家排放标准。Ammonia in APT crystal mother liquor was removed by adding sodium tungstate with sodium hydroxide and magnesium salts. The results show that the content of ammonia in the treated solution can be removed down to 0. 042 g/L up to 98.88% removal rate. The resultant sodium tungstate solution was diluted 10 times before prepared as ion exchange feed solution, the content of ammonia in the raffinate is less than 0. 000 5 % ,which can meet China national discharge standard.

关 键 词：仲钨酸铵 结晶母液 转化脱氨 镁盐沉淀 

分 类 号：TF803.25[冶金工程—有色金属冶金]