微波氯化焙烧对低品位铀矿浸出的影响  

Effect of Microwave Chlorination Roasting on Leaching of Low-grade Uranium Ore

作　　者：廖炳友 王学刚[1,2] 刘超[1,2] 徐苏北 王廷健 刘泓伟 龙杰 王世俊 LIAO Bing-you;WANG Xue-gang;LIU Chao;XU Su-bei;WANG Ting-jian;LIU Hong-wei;LONG Jie;WANG Shi-jun(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,南昌330013 [2]东华理工大学水资源与环境工程学院,南昌330013

出　　处：《有色金属（冶炼部分）》2021年第8期106-110,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(52064001);江西省自然科学基金项目(20202BABL203022)。

摘　　要：针对低品位铀矿采用传统酸浸工艺浸出率低的问题,开展了微波氯化焙烧浸出研究,考察了氯化剂种类与添加量、微波焙烧温度、微波焙烧时间等对铀浸出率的影响。结果表明,矿石铀含量为0.0842%,在氯化铁添加量25%、焙烧温度310℃、焙烧时间60 min优化条件下,铀浸出率达到85.15%,与酸浸工艺相比,铀浸出率提高了17.64个百分点。微波氯化焙烧破坏了矿石结构,产生了微裂纹和孔隙,有利于溶浸剂与铀矿物接触反应,从而提高了铀浸出率。To address low leaching rate of low-grade uranium ore during traditional acid leaching process,microwave chlorination roasting pretreatment leaching test was carried out.Effects of chlorination agent type and dosage,microwave roasting temperature and time on uranium leaching rate were investigated.The results show that uranium leaching rate is 85.15% under the conditions including uranium content of ore of 0.0842%,ferric chloride addition of 25%,roasting temperature of 310℃,and roasting time of 60 min.Uranium leaching rate rises by 17.64 percent points compared with acid leaching process.After microwave chlorination roasting,ore structure is destroyed,micro-cracks and pores are produced,which promote contact reaction between leaching agent and uranium,thus,improving leaching rate of uranium.

关 键 词：低品位铀矿石 微波 氯化焙烧 酸浸 

分 类 号：TL212.1[核科学技术—核燃料循环与材料]