【摘要】 载体盐⁷LiF的回收是熔盐堆核燃料后处理的重要环节。提出了一种利用氢氟酸溶解技术实现熔盐堆干法处理尾料中LiF分离回收的工艺。首先考察了氢氟酸浓度、溶解时间和溶解温度对LiF及ThF₄在氢氟酸中溶解的影响,得到LiF与ThF₄分离的最优溶解分离工艺条件,并对其溶解机制做了初步探讨。随后进行了混合氟盐中LiF的分离回收实验,结果表明LiF的收率在95%以上,产品LiF纯度在97%以上。更多还原

【Abstract】 The recovery of ⁷LiF in carrier salt is the key process in molten-salt reactor spent fuel reprocessing.A kind of hydrofluoric acid solubility method was adopted to realize the LiF separation-recovery process with molten-salt reactor dry method reprocessing tails as crude material.First of all,the effects of concentration of hydrofluoric acid,dissolution time,and dissolution temperature on dissolution of LiF and ThF₄ in hydrofluoric acid were investigated.The optimum dissolution separation conditions of LiF and ThF₄ were obtained and a primarily discussion was made on the dissolution mechanism.After that,LiF in mixed fluoride salts separation-recovery research has been carried on.Results showed that the recovery of LiF was over95%,and LiF purity of the product was over 97%.更多还原