STUDY ON LICL WASTE SALT TREATMENT PROCESS BY LAYER MELT CRYSTALLIZATION

摘要

Layer melt crystallization operated static mode has been applied to separate Group Ⅰ and Ⅱ chlorides from surrogate LiCl waste salt. The effects of operating conditions such as crystal growing rate (or flux) and initial impurity concentration on separation(or concentration) of cesium , strontium and barium involved in a LiCl melts were analyzed. In a layer crystallization process, separation was impaired by occlusion of impurities and by residual melt adhering to LiCl cystal after at the end of the process. The crystal growth rate strongly affects the crystal structure, therefore the separation efficiency, while the effect of the initial Cs and Sr concentration in LiCl molten salt was nearly negligible within this experimental range.