天然铀纯化生产降低硝酸单耗的研究  

Study on the reduction of unit consumption of nitric acid in the natural uranium purification

作　　者：龚道坤 王英 

机构地区：[1]中核二七二铀业有限责任公司,湖南衡阳421004

出　　处：《铀矿冶》2016年第4期265-269,共5页Uranium Mining and Metallurgy

摘　　要：通过对溶解、萃取原液配制、反萃取等使用硝酸的工序进行工艺分析,推导计算了天然铀纯化生产的理论硝酸单耗。通过进一步试验发现,无论是以重铀酸盐还是铀的氧化物为原料的天然铀纯化生产,硝酸单耗均可控制为1.35t。针对重铀酸盐与八氧化三铀,随着铀品位的提高,硝酸单耗还可以更低;对于八氧化三铀,提高溶解温度以及在溶解之前对物料进行煅烧处理,均可降低硝酸单耗。By analyzing nitric acid consumption in the process of dissolving, extracting solution prepa-ration and anti extraction, theoretical nitric acid unit consumption was derived . Further industrial ex-periments discovered that either using diuranate or uranium oxide as raw material in the natural urani- um purification process, nitric acid unit consumption can be controlled at 1. 35 t , As the improvement of uranium content in the diuranate and U3 0 8 , nitric acid unit consumption can be further reduced. For U3 08 , improving the dissolution temperature and calcining U3 Og before dissolution can also re-duce the nitric acid consumption.

关 键 词：铀 纯化 硝酸 单耗 

分 类 号：TL213.32[核科学技术—核燃料循环与材料]