Impurity distribution in distillate of terbium metal during vacuum distillation purification

作     者：Xiao-wei ZHANG Rui-ying MIAO Dao-gao WU Qiong ZHU Zhi-qiang WANG De-hong CHEN Shi-hong YAN 张小伟;苗睿瑛;吴道高;朱琼;王志强;陈德宏;颜世宏

作者机构：National Engineering Research Center for Rare Earth Materials General Research Institute for Nonferrous MetalsGrirem Advanced Materials Co. Ltd. Beijing 100088 China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2017年第27卷第6期

页      面：1411-1416页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0813[工学-建筑学] 0814[工学-土木工程] 0702[理学-物理学] 

基　　金：Project(51504036) supported by the National Natural Science Foundation of China Project(2012CBA01207) supported by the National Basic Research Program of China Project(2011AA03A409) supported by the National High-Tech Research and Development Program of China 

主　　题：vacuum distillation purification modified separation coefficient terbium metal impurity distribution liquid metal 

摘      要：The distribution rules of impurities in distilled terbium metal were investigated by vacuum distillation purificationexperiment and theoretical *** is found that Ti impurity in distilled terbium is220mg/kg in the initial stage of the distillationpurification,increases slowly in the middle stage,and increases rapidly in the last stage,reaching2260mg/kg,and the modifiedseparation coefficient of Ti is1/*** diffusion of the impurity Ti in liquid metal can reach a quasi-equilibrium state in theinitial stage of distillation purification and the calculated results agree well with experimental results;the distribution profile ofimpurity Cu is opposite to Ti,being380mg/kg in the initial stage,decreasing linearly to290mg/kg in the last stage,and themodified separation coefficient is17.99,and the theoretical calculated results are inconsistent with the experimental result.