在铀的转化工艺中,需要用Ca对UF4进行还原,以实现U的纯化,因此会产生CaF2废渣。由于吸附夹带等因素,CaF2废渣中含有一定量U(据称约5%),将其中的U提取并纯化具有重要的实用价值。在研究从CaF2废渣回收纯化工艺之前,首先需要对其化学组成及其中的U含量进行分析。本工作对CaF2废渣样品中的U含量,分别用中子活化法和滴定法进行了分析,活化分析结果(表1)和滴定分析均证明样品中的U含量约为0.05%。 In the uranium conversion process, UF4 needs to be reduced with Ca in order to achieve the purification of U, so CaF2 waste residue will be generated. Due to adsorption entrainment and other factors, CaF2 waste contains a certain amount of U (about 5% said), the extraction and purification of U has important practical value. Before studying the process of recovery and purification of CaF2 waste residue, we first need to analyze its chemical composition and its U content. In this work, the content of U in CaF2 waste samples was analyzed by neutron activation method and titration method. The results of activation analysis (Table 1) and titration analysis all showed that the content of U in the samples was about 0.05%.