中文摘要：

对藏北碳酸盐型盐湖提锂工艺过程中不同阶段的卤水进行采样分析，不仅可了解盐田工艺不同阶段的主要卤水组分浓缩规律，也可了解其它组分的浓缩规律，主要是Br^-、Rb^＋、Cs^＋等有价值组分。在盐田晒卤过程中，Br^-、Rb^＋、Cs^＋的浓度是持续增大的，但还未达到饱和状态，三者在卤水中的浓缩速度随着卤水浓度的增加而逐渐下降。在太阳池结晶过程中，Br^-、Rb^＋、Cs^＋以高浓度状态继续保留于太阳池底层卤水中。从盐田晒卤到太阳池结晶过程中，Rb^＋、Cs^＋、Br^-的浓度一直处于上升趋势，表明三者在卤水的赋存状态还未达到饱和。这些特点可为盐湖资源综合利用提供重要参考。

英文摘要：

Brines of the different stages were sampled and analyzed in the process of lithium extraction from carbonate saline lakes in the northern Tibet, which can not only understand the concentration laws of the main brine components in different stages of the process, but also other components, mainly such valuable components as Br^-、Rb^＋ and Cs^＋. In the salt pond evaporation stage, the concentrations of Br^-、Rb^＋ and Cs^＋ were continuously increased, but did not yet attain the saturation state, and the evaporation speeds of the three components were gradually decreased with the increase of the concentration of the brine. In the solar pond crystallization stage, Br^-, Rb ^＋ and Cs ^＋ , which were in a high concentration state, continued to remain at the bottom brine of the solar pond. From the salt pond evaporation stage to solar pond crystallization stage, the concentration of Br^- , Rb ^＋ and Cs^ ＋ always maintained a rising trend, indicating that the three components were unsaturated. These features may provide an important reference for comprehensive utilization of the saline lake resources.