一次还原蒸馏制备高纯金属镱的工艺  

Preparation of high purity ytterbium metal by once reduction distillation

作　　者：张先恒[1,2] 赵二雄 苗旭晨 刘玉宝 陈国华[1,2] 董岳阳 ZHANG Xianheng;ZHAO Erxiong;MIAO Xuchen;LIU Yubao;CHEN Guohua;DONG Yueyang(Baotou Research Institute of Rare Earths,Baotou014030,Nei Mongol,China;State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou 014030,Nei Mongol,China)

机构地区：[1]包头稀土研究院,内蒙古包头014030 [2]白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030

出　　处：《金属功能材料》2020年第6期28-33,共6页Metallic Functional Materials

摘　　要：对镧热还原法制备金属镱进行了热力学、动力学分析,初步确定了还原蒸馏的工艺参数;研究了以99.99%(质量分数)氧化镱为原料,氟盐-氧化物体系电解金属镧为还原剂,真空碳管炉为还原装置,通过自行设计接收装置,在真空度小于10^(-2) Pa,1 180℃条件下,一次蒸馏制得金属镱。结果表明,金属镱纯度(Yb/TRE)99.99%(质量分数),金属镱直收率达到97.84%(质量分数)。新工艺与一次还原蒸馏相比,金属镱中杂质La降低了96.5%,稀土收率提高了4.48%。Based on thermodynamics and kinetics analysis for preparation of metallic ytterbium by the process of lanthanum thermal reduction,preliminary process parameters were determined.By using ytterbium oxide(99.99%purity)as raw material,with electrolytic metal lanthanum of fluoride salt-oxide system as reducing agent,vacuum carbon tube furnace as reaction device,through self-produced receiving device,on vacuum degree no more than10-2 Pa,ytterbium was obtained after one distillation on 1180℃.The results showed that metal ytterbium purity(Yb/TRE)was 99.99%,prepared with the ytterbium metal yield more than 97.84%.Compared with the one time reduction distillation,lanthanum impurity deceased by about 96.5%,the yield of rare earth increased by 4.48%.

关 键 词：镱 镧热还原 真空蒸馏 稀土收率 

分 类 号：TF845[冶金工程—有色金属冶金]