用重结晶法纯化重铀酸铵和高钼三碳酸铀酰铵  

PURIFICATION OF ADU AND HIGH-MOLYBDENUM AUC BY RECRYCTALLIZATION

作　　者：谭焕昌 文锦凤 

机构地区：[1]湖南核工业总公司二七二厂

出　　处：《铀矿冶》1995年第1期30-36,共7页Uranium Mining and Metallurgy

摘　　要：重铀酸铵用浓碳酸铵溶液制浆，生成三碳酸铀酰铵。所制备的三碳酸铀酰铵和高钼三碳酸铀酰铵晶体，分别用热软化水溶解、过滤或澄清、渣洗涤。清液加热煮解，所得浆液浓密，浓浆体加浓碳酸铵溶液转化，重结晶，晶体洗涤，过滤，制得高纯三碳酸铀酰铵晶体。小型试验和半工业试验结果表明，该纯化流程是可行的，省去了苹取过程，大幅度降低了化工材料消耗费用，减少了环境污染，工艺易实现。The ADU was converted to AUC by preparing pulp with(NH4)2CO3 concentrated solution,and then the prepared AUC (high-molybdenum AUC) cryctals were dissolved with hot soft water for dissolution, and after filtration or clarification and scrubbing of the residue, and the clarified solution was digested and the obtained pulp was thikened and the thikened pulp was converted and recrystallized by adding (NH4)2CO3 concentrated solution.The crystals were washed and filtrated, and then the high-purity AUC crystals were prepared. The laboratory and pilot-plant scale experiments showed that the presented purification process was feasible with the solvent extraction step eliminated,so the chemicals consumption would be considerably decreased and the environmental pollution would be lowered. It is easy to realize the process in practice.

关 键 词：重铀酸铵 三碳酸铀酰铵 纯化 重结晶 

分 类 号：TQ113.79[化学工程—无机化工]