含氟体系中重铀酸铵沉淀过程的研究  

STUDIES ON THE PRECIPITATION OF AMMONIUM URANATE FROM FLUORIN CONTAINED SOLUTION

作　　者：康仕芳[1] 余正[1] 赵王君[1] 

机构地区：[1]天津大学化学工程系

出　　处：《核科学与工程》1999年第1期69-75,共7页Nuclear Science and Engineering

摘　　要：应用ＵＦ６水解模拟液ＵＦ２Ｏ２＋４ＨＦ与ＮＨ３水反应研究了ＡＤＵ的沉淀过程，研究结果认为，ＡＤＵ的沉淀过程可分为：中和阶段、ＡＵＦ［（ＮＨ４）３ＵＯ２Ｆ５］生成阶段、ＡＤＵ生成阶段。并对中间化合物ＡＵＦ结晶生成规律，化学组成等进行了研究。详细讨论了一些重要工艺条件对ＡＤＵ生成条件及特性的影响。ADU precipitation is studied by potentiometric titration of UO 2F 2+4HF with ammonia. It is found that the ADU precipitation process consists of neutralization, formation of AUF and formation of ADU. The formation conditions, the chemical composition and the microstructure of intermediate product AUF crystal are researched. The effects of some important technological parameters on the chemical composition and microstructure of the ADU precipitate are discussed.

关 键 词：ADU 沉淀结晶 AUF 重铀酸铵 核燃料 含氟体系 

分 类 号：TL213[核科学技术—核燃料循环与材料]