含铀沉淀物中铀的浸出工艺研究  

Study on Leaching Technology of Uranium from Uranium-containing Precipitates

作　　者：徐青霖 刘光梁 侯彦龙 张鑫野 XU Qinglin;LIU Guangliang;HOU Yanlong;ZHANG Xinye(The 404 Company Limited,CNNC,Lanzhou 732850,China)

机构地区：[1]中核四0四有限公司,甘肃兰州732850

出　　处：《铀矿冶》2025年第1期126-130,共5页Uranium Mining and Metallurgy

摘　　要：铀纯化转化生产线会产生重铀酸钠沉淀和杂质渣。为回收其中的金属铀及减少废物量,用硝酸直接浸出法、煅烧预处理—硝酸浸出法进行了从含铀沉淀物中回收金属铀的研究,分析了浸出液中杂质离子的含量,确定了影响铀浸出率的主要因素。在最佳工艺条件下,煅烧预处理—硝酸浸出法、硝酸直接浸出法的铀浸出率分别为98.14%和96.11%,含铀沉淀物的质量可减少约85%~90%。The uranium purification and conversion line will produce sodium diuranate precipitation and impurity residue.In order to recover the metallic uranium and reduce the waste mass,the uranium metal was recovered from these uranium-containing precipitates by nitric acid direct leaching and calcination-nitric acid leaching method.The content of impurity ions in the leaching solution were analyzed,and the main factors affecting the leaching rate of uranium were determined.Under the optimum conditions,the leaching rates of uranium by calcination-nitric acid leaching and direct nitric acid leaching are 98.14%and 96.11%respectively,and the mass of uranium-containing precipitates can be reduced by about 85%~90%.

关 键 词：含铀沉淀物 回收铀 硝酸 焙烧 酸法浸出 杂质离子 

分 类 号：TL212.12[核科学技术—核燃料循环与材料]