Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第28卷    第12期    总第237期    2018年12月

[PDF全文下载]        

    

文章编号:1004-0609(2018)-12-2590-08
选择性还原铥-镱-镥富集物制备金属镱和铥
郝占忠,许林成

(包头师范学院 化学学院,包头 014030)

摘 要: 基于物理化学基本理论分析金属镧还原铥-镱-镥富集物制备金属镱、铥的可行性,在此基础上,以铥-镱-镥富集物为原料,金属镧为还原剂,采用选择性还原方法,研究由铥-镱-镥富集物制备金属镱、铥时反应温度对还原率和收率的影响,并对稀土分离效果和非稀土杂质的去除能力进行分析。结果表明:还原率与收率随温度升高而增加,在铥-镱-镥富集物与金属镧摩尔比为1:2.5、系统压力为0.1 Pa条件下,当温度为1600 K、保温时间为1.5 h时,金属镱的还原率为92.1%、收率为91.2%、金属镱的纯度为99.83%(含24个杂质);当温度为2000 K、保温时间为2.0 h时,金属铥的还原率为85.4%、收率为84.3%、纯度为97.12%。选择性还原法对分离富集物中的稀土效果显著,对去除非稀土杂质也有一定效果。

 

关键字: 铥-镱-镥富集物;选择性还原;金属铥;金属镱;物理化学分析

Preparation of metallic ytterbium and thulium by selective reduction of thulium-ytterbium-lutetium enrichments
HAO Zhan-zhong, XU Lin-cheng

School of Chemistry, Baotou Teachers College, Baotou 014030, China

Abstract:Based on the theory of physical chemistry, the preparation feasibility of metallic ytterbium and thulium by metallic lanthanum reduction of thallium-ytterbium-lutetium enrichments was analyzed. Using the thulium-ytterbium- lutetium enrichments as raw materials and metallic lanthanum as a reducing agent, when metallic ytterbium and thulium were prepared from thulium-ytterbium-lutetium enrichments by method of selective reduction, the effects of reaction temperature on the reduction rate and yield were studied. The separation effects of rare earth and the removal ability of non-rare earth impurities were analyzed. The results show that the reduction rate and yield increase with the increase of temperature. Under the condition that the molar ratio of thulium-ytterbium-lutetium enrichments and metallic lanthanum is 1:2.5, and the system pressure is 0.1 Pa, when the temperature is 1600 K and the holding time is 1.5 h, the reduction rate of ytterbium is 92.1%, the yield is 91.2%, the purity is 99.83% (containing 24 impurities); when the temperature is 2000 K and the holding time is 2 h, the reduction rate of thulium is 85.4%, the yield is 84.3%, the purity is 97.12%. The method of selective reduction has a remarkable effect on separation of rare earth from the enrichment, and it has some effect on the removal of non-rare earth impurities.

 

Key words: thulium-ytterbium-lutetium enrichment; selective reduction; metallic thulium; metallic ytterbium; physical chemistry analysis

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com