一、前言炼铀工艺中的主要关键是铀和杂质的分离问题,解决这一个问题的方法是利用铀和杂质在两相间分配的差异,而络合物的形式可以改变分配系数,使之有利于达到分离的目的。如果两相是溶液和沉淀,这就是沉淀分离法。如果两相是水溶液和萃取剂,这就是萃取分出法,如 I. INTRODUCTION The key point in the process of refining uranium is the separation of uranium and impurities. The solution to this problem is to utilize the differences in the distribution of uranium and impurities between the two phases, whereas the complex forms can change the partition coefficients such that Benefit to achieve the purpose of separation. If the two phases are solution and precipitation, this is the precipitation method. If the two phases are aqueous and extractant, this is the extractive method, such as