Lithium can be found in its bound form in silicatic rocks and dissolved in salt lake brines. Both types of lithium resources, whose amounts exceed the expected demand for lithium by several times, are used for lithium recovery. The known lithium resources and their geochemical characteristics are reviewed together with the presently applied recovery processes which are still very similar to the historically early techniques. New processes for direct carbonization of zinnwaldite, hydrochloric and oxalic acid leaching as well as a new method for the recovery of lithium from magnesium‐rich brines are presented.

中文翻译：

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从具有挑战性的矿床中回收锂：Zinnwaldite和富含镁的盐湖盐卤

锂以其结合形式存在于硅质岩中，并溶于盐湖盐水中。两种类型的锂资源（其数量超出预期的锂需求数倍）都用于锂回收。回顾了已知的锂资源及其地球化学特征以及目前应用的回收方法，这些方法仍与历史上早期的技术非常相似。提出了一种新的方法，用于锌矿的直接碳化，盐酸和草酸的浸出，以及从富含镁的盐水中回收锂的新方法。