含铀难浸碱渣加温加压强化浸出试验研究  

Experimental Study on Pressure Leaching of Uranium-Containing Alkaline Residue

作　　者：周龙 王清良 刘进平 张聪 雷治武 王红强 胡鄂明 ZHOU Long;WANG Qing-liang;LIU Jin-ping;ZHANG Cong;LEI Zhi-wu;WANG Hong-qiang;HU E-ming(School of Resources Environment and Safety Engineering,University of South China,Hengyang 421001,Hunan,China;Xinjiang CNNC Tianshan Uranium Industry Co Ltd,Yili 835000,Xinjiang,China)

机构地区：[1]南华大学资源环境与安全工程学院,湖南衡阳421001 [2]新疆中核天山铀业有限公司,新疆伊犁835000

出　　处：《矿冶工程》2022年第3期96-99,共4页Mining and Metallurgical Engineering

基　　金：国防科工二司核能开发项目(科工二司[2019]1152号,190GJG001)。

摘　　要：采用加温加压强化手段浸出某难浸碱渣中铀,研究了难浸碱渣粒度、用水量、浸出温度、浸出时间对铀浸出率的影响。结果表明:在难浸碱渣原样粒度-0.074 mm、碱渣质量∶浓硝酸体积∶用水量为1∶5∶6、浸出温度150℃、浸出时间2 h时加压加温浸出,难浸碱渣的质量从100 g降到45 g以下,渣中铀含量由1.47%降到0.52%以下,铀浸出率可达85%。此工艺具有铀浸出率高、渣易过滤的特点,对现场处理难浸渣具有指导意义。Uranium was leached from a kind of alkaline residue by pressure leaching, and the effects of particle size of alkaline residue, water consumption, leaching temperature and leaching time on uranium leaching rate were investigated. Results show that after the leaching residue sample with a grain size of-0.074 mm is subjected to a 2 h-leaching process at 150 ℃, with the mass of alkaline residue, volume of concentrated nitric acid and water consumption at a ratio of 1∶ 5∶ 6, the mass of refractory residue is reduced from 100 g to less than 45 g, and the uranium content in the leaching residue is reduced from 1.47% to less than 0.52%, leading to the uranium leaching rate up to 85%. This processing technique, being characterized by high uranium leaching rate and easy filtration of residue, is of guiding significance for on-site treatment of refractory residue.

关 键 词：难浸碱渣 加温加压浸出 强化浸出 铀 浸出率 

分 类 号：TF111[冶金工程—冶金物理化学]