摘要
研究了使用次氯酸钠高度净化离子型稀土分解液中氨氮的工艺参数,考察了次氯酸钠加入方式、次氯酸根和铵根物质量之比、反应时间、反应温度对稀土分解液中氨氮净化效果的影响。结果表明,对氨氮净化效果最佳的工艺参数为:次氯酸根和铵根物质量之比为4:1、次氯酸钠平均分4次加入、反应时间60min、反应温度25℃,在此条件下,稀土分解液中氨氮含量显著下降至5mg/L以下,氨氮去除率超过99%。
The process parameters of using sodium hypochlorite to highly purify the ammonia nitrogen in the ion-type rare earth decomposition liquid were studied,and the effects of the addition method of sodium hypochlorite,the ratio of hypochlorite and ammonium radicals,the reaction time and the reaction temperature on the purification effect of the ammonia nitrogen in the rare earth decomposition liquid were investigated..The results show that the best process parameters for the purification effect of ammonia nitrogen are:the ratio of hypochlorite to ammonium is 4:1,sodium hypochlorite is added in an average of 4 times,the reaction time is 60 min,and the reaction temperature is 25℃.Under these conditions,The content of ammonia nitrogen in the rare earth decomposition solution is significantly reduced to less than 5 mg/L,and the removal rate of ammonia nitrogen exceeds 99%.
作者
伍莺
张选旭
周洁英
陈冬英
温德新
邹征刚
WU Ying;ZHANG Xuan-xu;ZHOU Jie-ying;CHEN Dong-ying;WEN De-xin;ZHOU Zheng-gang(Ganzhou Nonferrous Metallurgy Research Institute Co.,Ltd,Ganzhou China,341000;National Rare Earth Function Materials Innovation Center,Ganzhou,China 341000)
出处
《世界有色金属》
2021年第14期123-125,共3页
World Nonferrous Metals
基金
江西省重点研发计划项目(20202BBGL73116)
赣州市科技计划项目(赣市科发[2020]60号)。
关键词
氨氮
次氯酸钠
离子型稀土
净化
Ammonia Nitrogen
Sodium hypochlorite
Ionic mixed rare earth
purification
作者简介
伍莺(1987-),女,江西赣州人,硕士,工程师,主要从事稀土湿法冶金研究。
