Study on the Salts Crystallization Behaviors of the Brine of Lake Beidachi

Based on the analysis of Na+,Mg2+// SO2-4,Cl-—H2O phase diagram,the paper studies the salts crystallization behaviors of the brine of Lake Beidachi at-5℃ and 25℃.The result reveals the resonable production process for the comprehensive utilization of the lake brine as follows: Firstly the production of NaCl with the solar evaporation of the surface lake brine;Secondly the production of Na2SO4·10H2O by chilling the mother liquor discharged from the first step;Thirdly the production of Na2SO4·10H2O through chilling the deep-layer brine;Finally the production of NaCl with the solar evaporation of the discharged mother liquor from the third step.