长链聚合磷酸酯络合沉淀分离稀土与铝的研究  

Separation of Rare Earth and Aluminium by Long-chain Polymeric Phosphate Complexation Precipitation

作　　者：李金辉 褚宇航 龙光武 刘文新 刘晋彪 王瑞祥 徐志峰 LI Jinhui;CHU Yuhang;LONG Guangwu;LIU Wenxin;LIU Jinbiao;WANG Ruixiang;XU Zhifeng(Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China;President Office, Jiangxi College of Applied Technology, Ganzhou 341000, Jiangxi, China)

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 [2]江西应用技术职业学院,江西赣州341000

出　　处：《矿产保护与利用》2021年第5期12-17,共6页Conservation and Utilization of Mineral Resources

基　　金：国家自然科学基金(51974140,52064018);国家重点研发计划项目(2019YFC1908404,2019YFC1908405);江西省科技厅重大项目(20192ACB70017);江西省离子型稀土资源绿色开发与高值利用国家重点实验室培育计划(20194AFD44003);江西省高等学校井冈学者特聘教授岗位资助项目。

摘　　要：在离子型稀土矿浸出过程中,稀土浸出的同时大量的非稀土杂质如铝离子也会进入稀土浸出液中。本文针对稀土浸出液中杂质铝离子的去除问题展开研究,采用聚磷酸丁二酯选择性络合沉淀料液中的稀土元素,分别考察了溶液pH、聚磷酸丁二酯的量、反应时间、反应温度对除铝效果的影响,结果表明:以聚磷酸丁二酯作为络合沉淀剂,控制模拟料液的pH值为2.5、加入m(聚磷酸丁二酯单体):m(RE^(3+))=12:1当量的聚磷酸丁二酯、反应时间为10 min、反应温度为50℃时,稀土的沉淀率为91.35%,铝的共沉淀率为11.22%,有效地实现了稀土与铝的分离。In the leaching process of ionic rare earth ore,a large number of non-rare earth impurities such as aluminum ions will also enter the leaching solution.In this paper,the removal of impurity aluminum ions in the rare earth leaching solution was studied.The rare earth elements in the feed solution were selectively precipitated by polybutylene phosphate.The effects of solution pH,amount of polybutylene phosphate,reaction time and reaction temperature on the removal effect of aluminum were investigated respectively.The results show that:polybutylene phosphate is used as a complex precipitation agent,the pH value of the simulated feed liquid is controlled to 2.5,the polybutylene phosphate dosages is m(REG monomer):m(RE^(3+))=12:1 equivalent is added,the reaction time is 10 min,the reaction temperature At 50℃,the precipitation rate of rare earth is 91.35%,and the precipitation rate of aluminum is 11.22%,which effectively separates rare earth from aluminum.

关 键 词：稀土 铝 聚磷酸丁二酯 络合沉淀 分离 

分 类 号：TF845[冶金工程—有色金属冶金] TD983[矿业工程—选矿]