采卤过程中光卤石的沉淀与溶解

In process of mining brine the sediment and dissolution of cavnallit

利用Ｐｉｔｚｅｒ的离子相互作用理论和化学热力学理论，计算了各实验点晶间卤水中相关离子的活度，以及晶间卤水对光卤石（ＫＭｇＣｌ３·６Ｈ２Ｏ）的饱和指数，得出了与实验结果一致的结论。通过理论计算和实验可知，随着采卤过程的进行，不同水质的卤水相互混和，在某些有利地段，可形成过饱和卤水，使钾、镁等组份以光卤石的形式析出。

In this paper, the activity coefficients of interrelated ions and saturation coefficient of cavnallit in brine which is among salt grains, are calculated by using Pitzer's theory of ion interaction and chemical thermodynamics for each experiment point that are in Qarhan salt lake. The results of calculating and observing in experiment show no difference.The following conclusion is obtained: In the process of mining brine, as different brines mix each other, the super-saturated mixed brine is formed at some certain beneficial section; and the beneficial components, like K Mg, etc., can be separated out as the type of cavnallit.