某砂岩铀矿石低酸氧浸试验研究  

Study of Leaching by Rarefactive Acid on Sandstone Uranium Ore

作　　者：王立民[1] 廖文胜[1] 谭亚辉[1] 李建华[1] WANG Limin;LIAO Wensheng;TAN Yahui;LI Jianhua(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：《铀矿冶》2020年第3期191-197,203,共8页Uranium Mining and Metallurgy

基　　金：中核集团核心能力提升资助项目(中核研发〔2016〕297号)。

摘　　要：对某高酸耗砂岩铀矿石进行了低酸度、高压氧气条件下的室内浸出试验研究,结果表明:当浸出剂pH为2.00~2.20、以氧气作氧化剂时,在氧压1.5 MPa的搅拌浸出条件下,铀的浸出率可达到89%以上;在氧压为1.0 MPa的柱浸条件下,铀浸出率为80%~85%。试验条件下,低酸氧浸的浸出率均高于以H 2O 2作氧化剂条件下的浸出率,浸出过程的酸耗为17.2~37.6 t/t矿石,浸出液中Fe 2+、Al 3+质量浓度分别为400 mg/L和90 mg/L,生产成本和沉淀风险均大幅度降低。The leaching experiment on high acid-consuming sandstone uranium is conducted,the result indicated that the recovery rate of uranium achieves 89%under rarefactive acid and oxygen as oxidant in the pressurized batch leaching,and that is 80%~85%for the pressurized column leaching,both of which recovery rate exceed the leaching by H 2O 2 as oxidant.The acid-consuming of leaching ore is 17.2~37.6 t/t ore,and the concentration of Fe^2+、Al^3+in the leach liquor reduce to 400 mg/L and 90 mg/L.The cost of production and risk of ionic compound subsiding are dropped sharply.

关 键 词：砂岩铀矿石 低酸浸出 加压氧化 高酸耗 

分 类 号：TL212.12[核科学技术—核燃料循环与材料]