氯离子体系铀溶液中铁、钍、稀土的去除研究  

Study on Removal of Iron,Thorium and Rare-Earth from Uranium Solution in Chloridion System

作　　者：曹令华[1] 张海燕[1] 曹笑豪 王皓[1] 李大炳[1] 任燕[1] 周志全[1] 舒祖骏[1] CAO Linghua;ZHANG Haiyan;CAO Xiaohao;WANG Hao;LI Dabing;REN Yan;ZHOU Zhiquan;SHU Zujun(Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149,China)

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《有色金属（冶炼部分）》2024年第6期65-70,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(U2067201)。

摘　　要：采用复盐沉淀法,用硫酸钠同时去除氯离子体系铀溶液中的铁、钍、稀土杂质离子,并研究了硫酸钠用量、反应温度、反应时间、体系pH等对除杂效果的影响。结果表明,反应的最佳条件为:硫酸钠用量为理论量的160%、反应温度95℃、反应时间2 h、体系pH=0.75~1.25。在此优化条件下,铁、钍和总稀土的平均去除率分别达到99.62%、99.42%和98.27%,铀的平均回收率为99.87%。方法具有除杂效果好、铀损失率低、易分离等优点。The impurity ions of iron,thorium and rare-earth in uranium solution of chloride ion system were simultaneously removed with sodium sulfate by double salt precipitation method.The effects of sodium sulfate dosage,reaction temperature,reaction time and pH value on impurity removal were studied.The results show that the removal rate of iron,thorium and rare-earth is 99.62%,99.42%and 98.27%respectively,and recovery rate of uranium is 99.87%under the optimum condition including Na 2 SO_(4) dosage of 160%of theoretical amount,reaction time of 2 h,reaction temperature of 95℃,and pH value of reaction system of 0.75-1.25.The method has the advantages of good impurity removal effect,low loss rate of uranium and easy separation.

关 键 词：铀 铁 稀土 钍 复盐沉淀 黄钠铁矾 

分 类 号：TF803.2[冶金工程—有色金属冶金] TL212.12[核科学技术—核燃料循环与材料]