针对含有Li+、Na+、K+、Cl-、SO42-的盐湖卤水，研究了具有不同组成特征的卤水在自然降温和人工降温条件下的液相组成变化以及析盐规律。研究表明：对于组成相同的卤水，自然降温和人工降温对盐结晶规律的影响 不大；对于硫酸盐含量偏高的卤水，随着温度的降低液相中的硫酸根含量会逐渐降低，在-10 ℃最为明显，降温至 -15 ℃时硫酸根质量分数在0.5%左右；对于硫酸根含量低、锂含量高的卤水，随着温度的降低氯化钾析出，锂离子有所富集；和常温相比，低温下含Li+、Na+、K+、Cl-、SO42-的盐湖卤水没有复盐析出。研究结果为低温下开发盐湖资源提供了理论指导。

Aimed at salt lake brine containing Li+，Na+，K+，Cl- and SO42-，the study on the change of liquid composition and crys tallization regularity of the brine with different compositions were carried out during natural and artificial cooling processes. The results showed：for the brines with the approximate concentrations，natural and artificial cooling processes had little effec ted on the change of liquid composition and crystallization regularity of the brine at some extent；for the brine with high conc entration of sulfate，as the decreasing of temperature，the sulfate content reduced gradually，especially at -10 ℃；when the tem perature decreased to -15 ℃，the sulfate mass fraction reached about 0.5%；for the brines with low sulfate and high lithium，as the temperature decreasing，potassium chloride crystallized out and lithium was enriched；compared with the normal tempera ture，there was no double salts separated from the salt lake brine containing Li+，Na+，K+，Cl- and SO42- at low temperature.The research would provide a theoretical guidance to exploit the salt lake source in the environment of low temperature.