• 标题：Liþ enrichment behavior in a sodium sulfate and low carbonate salt lake brine
• 关键词：Salt lake brines,Series change temperature,Lithium,Enrichment,Sulfur,Lithium magnesium ratio
• 作者：Yanfang Ma, Kanshe Li, Zhihong Zhang, Xin Liu

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The Laguo salt lake has both carbonate- and sodium-sulfate-type characteristics, and is famous for its resources, such as Li, B, K, Rb and Cs. Accordingly, it may be a potential source of lithium. The concentration of SO42 is known to inflfluence the evaporation process of brine enriched in lithium. Isothermal evaporation experiments show that Liþ precipitates as Li2SO4⋅H2O, which is very unfavorable for lithium enrichment processes. Therefore, a series of temperature-variation experiments were conducted to effectively control the concentration of SO42 in the brine. The SO42 content was reduced by lowering the brine temperature, and thus the desulfurization target was achieved, and the precipitation of lithium was controlled. At the same time, the Mg/Li, which is known to affect Li extraction, was reduced. From the temperature-variation experiments, we successfully obtained a highlithium brine can be obtained. Our results should provide a theoretical basis for the enrichment of lithium and the effificient utilization of resources in a composite salt lake brine.