酸法地浸采铀过程中杂质离子的沉淀及对铀沉淀的影响  

Formation of precipitation and its effect on uranium in-situ leaching process by acid

作　　者：闻振乾[1] 姚益轩[1] 牛玉清[1] 胥国龙[1] 谢廷婷[1] 何柯[1] 张翀[1] 

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》2015年第3期171-177,共7页Uranium Mining and Metallurgy

基　　金：国家高技术研究发展计划(863计划)项目(2012AA061802)资助

摘　　要：依据内蒙古某铀矿床酸法地浸浸出液成分,配制单一杂质金属离子的含铀溶液进行了沉淀试验,模拟了溶浸液迁移扩散过程中,随着SO2-4浓度的增加和pH升高,铀和杂质金属离子的沉淀行为。试验结果表明:Ca2+与SO2-4生成CaSO4沉淀,对铀无吸附作用;浸出液pH升高至7的过程中,Ca2+、Mg2+不会生成氢氧化物沉淀,但形成的Al(OH)3和Fe(OH)3沉淀物则可加速铀的沉淀;浸出液体系铀的沉淀受Al的影响大,由于Al(OH)3的吸附作用,使沉淀的氢氧化物成分复杂。The precipitation experiments were carried out after preparing the solution containing urani- um and the single metallic ion as impurity, according to the solution＇s components of the acid in-situ leaching for one uranium deposit in Inner Mongolia. The deposition behavior of uranium and the me- tallic ion was simulated as the concentration of SO4^2- and pH raised during the relocation diffusion course of the leaching solution. The results show that affected by SO4^2-, Ca^2＋ turns into CaSO4 , and it does not adsorb uranium. During the solution＇s pH rising to 7, Ca^2＋ and Mg^2＋ don＇t produce hydroxide precipitation. But AI（OH）3 and Fe（OH）3 produced during this period can accelerate the sedimentation process of uranium. In the leaching solution system, uranium＇s deposition is greatly affected by A1. For adsorbing effect of AI（OH）3, the components of hydroxide are complex.

关 键 词：酸法地浸 铀 浸出液 沉淀 

分 类 号：TL212.12[核科学技术—核燃料循环与材料]