真空蒸馏法综合回收稀土熔盐电解渣工艺研究  

Research on Comprehensive Recovery of Rare Earth Electrolytic Molten Salt Slag by Vacuum Distillation

作　　者：赖耀斌 徐建兵 李忠岐 梁鑫 陈东英 LAI Yaobin;XU Jianbing;LI Zhongqi;LIANG Xin;CHEN Dongying(Ganzhou Nonferrous Metallurgy Research Institute Co.,Ltd,Ganzhou 341000,China;National Engineering Research Center for Ionic Rare Earth,Ganzhou 341000,China)

机构地区：[1]赣州有色冶金研究所有限公司,赣州341000 [2]国家离子型稀土资源高效开发利用工程技术研究中心,赣州341000

出　　处：《真空科学与技术学报》2021年第4期332-335,共4页Chinese Journal of Vacuum Science and Technology

基　　金：江西省重点研发项目(20202BBGL73112)。

摘　　要：针对目前稀土熔盐电解渣中稀土、氟、锂综合回收率低的问题,研究开发了真空蒸馏处理稀土熔盐电解渣新工艺,考察了真空蒸馏温度、时间、真空度、原料粒度对稀土熔盐电解渣分离效果的影响。研究结果表明,在较优工艺条件下,F脱除率高达99.6%,氟化物回收率高达95.5%。与传统处理工艺相比,新工艺极大地缩短了工艺流程,且实现了渣中稀土、氟、锂资源的绿色高值利用。A new technology of vacuum distillation for the treatment of rare earth molten salt electrolytic slag is proposed to solve the current disadvantage of the low comprehensive recovery rate of rare earth, fluorine, and lithium in the slag.The influences of vacuum distillation temperature, time, vacuum degree, and particle size of raw materials on the separation of rare earth electrolytic molten salt slag are investigated.The results show that the removal efficiency of F and the recovery rate of fluoride are 99.6% and 95.3%,respectively.Compared with traditional technology, the new technology greatly simplifies the technical process and achieves high utilization of rare earth, fluorine, and lithium resources in the slag.

关 键 词：真空蒸馏 稀土 除氟 稀土熔盐电解渣 综合回收 

分 类 号：TF135[冶金工程—冶金物理化学]