含铀钍氯化稀土溶液中离子交换法提铀  

Uranium Extraction from Rare Earth Chloride Solution ContainingUranium and Thorium by Ion Exchange Method

作　　者：曹笑豪 曹令华[1] 张海燕[1] 李大炳[1] 王皓[1] 任燕[1] 赵凤岐[1] 舒祖骏[1] CAO Xiaohao;CAO Linghua;ZHANG Haiyan;LI Dabing;WANG Hao;REN Yan;ZHAO Fengqi;SHU Zujun(Beijing Research Institute of Chemical Engineering Metallurgy,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7期91-96,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金核技术联合基金资助项目(U2067201,U2267225);中核集团领创科研项目(CNNC-JCYJ-202211)。

摘　　要：提出了一种利用铀酰离子与Cl^(-)的络合,从高稀土低铀的含氯体系浸出液中分离提取铀而将大部分的稀土元素和钍留在浸出液中的离子交换法。研究了离子吸附过程中体系pH和氯离子浓度等对吸附效果的影响。结果表明,在反应pH=0~1、Cl^(-)浓度7 mol/L的优化条件下,饱和树脂对铀的吸附量能够达到43.34 mg/g。后续采用7 mol/L HCl溶液酸洗和去离子水淋洗,回收钍和稀土的同时实现了铀的分离提取。该技术不改变传统稀土提取工艺流程,仅增加铀提取工艺技术单元,可实现铀的分离与浓缩,具有工艺流程短、不影响原有稀土提取工艺和矿产最大化利用的特点。A new ion exchange method based on the complexation of uranyl ions with Cl^(-)was proposed to separate and extract uranium from the chloride containing leaching solution of high concentration rare earth and low concentration uranium,while leaving most of the rare earth elements and thorium in the leaching solution.The effects of pH value and chloride ion concentration on the adsorption were studied.The results show that under the optimal conditions of pH=0—1 and Cl^(-)concentration of 7 mol/L,the adsorption capacity of uranium by saturated resin can reach 43.34 mg/g.Subsequently,7 mol/L HCl solution was used for acid washing,followed by elution with deionized water to recover thorium and rare earths while achieving uranium separation and extraction.This technology does not change the traditional rare earth extraction process,but only adds the technical unit of uranium extraction process,which can realize the separation and enrichment of uranium,and has the characteristics of short process,no impact on original rare earth extraction process,and maximize the utilization of minerals.

关 键 词：铀 钍 稀土 氯离子 树脂 离子吸附 

分 类 号：TL212.12[核科学技术—核燃料循环与材料] TF845[冶金工程—有色金属冶金]