普通级氧化镧提纯新工艺研究  

Study on New Technology to Purify Regular Grade Lanthanum Oxide

作　　者：韦世强 WEI Shi-qiang(Chinalco Guangxi Nonferrous Rare Earth Development Co.,Ltd.,Nanning 530012,China)

机构地区：[1]中铝广西有色稀土开发有限公司,南宁530012

出　　处：《有色金属（冶炼部分）》2021年第7期78-82,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：广西科技重大专项(桂科AA18242022)。

摘　　要：采用树脂交换法制备超高纯氧化镧,树脂吸附及分离过程是技术难点之一。以稀土分离厂生产的普通级氯化镧(La2O3/ΣREO≈99%~99.999%)为原料,利用树脂交换法进行提纯研究,重点研究料液浓度、纯度,以及淋洗液在树脂柱中流速、pH、浓度、反应温度、压力等条件对提纯工作的影响因素,且获得较好的料液提纯指标:树脂的吸附率达到88.60%、分离效率为96.56%;提纯的料液再经沉淀、煅烧后,可获得目标高纯产品氧化镧,纯度达99.99995%。该技术方法具有工艺设备简单、成本低、投资省等优势,不仅为规模化生产提供科学支撑,也为其它稀土元素的提纯工作提供了参考。Resin adsorption and separation process is one of the key technical difficulties in preparation of ultra-pure lanthanum oxide by resin exchange method.Applying regular grade of rare earth separation plant production lanthanum chloride(La2O3/ΣREO=99%-99.999%)as raw material to investigate effects of material liquid concentration and purity,eluent of velocity in resin column,pH value,concentration,reaction temperature and pressure on purification by method of resin exchange.Better material liquid purification indexes of resin adsorption rate of 88.60%and separation efficiency of 96.56%are obtained.After precipitation and calcination,product of lanthanum oxide with purity of 99.99995%is obtained.This method has the advantages of simple equipment,low cost and low investment,which not only provides scientific support for large-scale production,but also provides a technical reference for purification of other rare earth elements.

关 键 词：氧化镧 提纯 稀土 

分 类 号：TQ133[化学工程—无机化工]