Comprehensive recovery method of metal lithium slag and chlorine

The invention relates to a comprehensive recovery method of metal lithium slag and chlorine, and belongs to the technical field of comprehensive treatment of lithium slag and chlorine. The technical problem to be solved by the invention is to provide a comprehensive recovery method for lithium slag and chlorine gas generated in electrolytic production of metal lithium. The method comprises the steps of high-temperature incineration, cooling digestion, spraying absorption, chlorine gas absorption, lithium salt preparation and the like, the metal lithium slag and chlorine gas can be comprehensively recycled, special equipment requirements are avoided, and the method is simple in process technical route, safe, reliable and high in feasibility. The lithium ions are returned to the lithium salt production from the lithium slag through the stages of incineration, absorption, chlorination and the like, so that the whole-process circulation of the lithium ions is realized, the loss of the lithium ions is reduced, and