摘要
对镧热还原法制备金属铕进行了热力学、动力学分析,初步确定了还原蒸馏工艺参数条件,进行了金属铕制备的试验,以99. 999%氧化铕为原料,采用氧化物电解的金属镧为还原剂,真空还原炉为反应设备,通过重新设计的接收器装置及工艺,在真空度小于10-2P,1200℃条件下,还原蒸馏制得金属铕。结果表明,金属铕纯度99. 99%,金属铕回收率大于97%。与原工艺加普通接收器相比,金属铕中杂质La降低了97%,铕的回收率提高了6%。
Based on thermodynamics and kinetics analysis for preparation of metallic europium by the process of lanthanum thermal reduction,preliminary process parameters were determined. By using europium oxide( 99. 999% purity) as raw material,vacuum reduction furnace as reaction device,by self-produced receiving device,on vacuum degree<10-2 Pa,europium was obtained after one distillation with oxide electrolysis metallic lanthanum as reducing agent in 1200 ℃.The results show that metal europium purity was 99. 99%,with yield more than 97%. Compared with original process and ordinary receiver,lanthanum impurity deceased by about 97%,the yield of rare earth increased by about 6%.
作者
张先恒
赵二雄
苗旭晨
陈国华
刘玉宝
ZHANG Xian-heng;ZHAO Er-xiong;MIAO Xu-chen;CHEN Guo-hua;LIU Yu-bao(Baotou Research Institute of Rare Earths,Baotou 014030,China;State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou 014030,China;National Engineering Research Center for Rare Earth Metallurgy and Functional Materials,Baotou 014030,China)
出处
《稀土》
EI
CAS
CSCD
北大核心
2019年第1期121-127,共7页
Chinese Rare Earths
关键词
金属铕
镧热还原
真空蒸馏
铕的回收率
europium metal
lanthanum thermal reduction
vacuum distillation
the yield of rare earth
作者简介
张先恒(1968-),男,内蒙古包头人,高级工程师,主要从事稀土火法冶炼的研究;通讯联系人:张先恒,E-mail:zhangxh2371@sina.com.
