Molten salt is an excellent medium for chemical reaction, energy transfer, and storage. Molten salt innovative technologies should be developed to recover metals from secondary resources and reserve metals from primary natural sources. Among these technologies, molten salt electrolysis is an economic and environment-friendly method to extract metals from waste materials. From the perspective of molten salt characteristics, the application of molten salts in chemistry, electrochemistry, energy, and thermal storage should be comprehensively elaborated. This review discusses further directions for the research and development of molten salt electrolysis and their use for metal recovery from various metal wastes, such as magnet scrap, nuclear waste, and cemented carbide scrap. Attention is placed on the development of various electrolysis methods for different metal containing wastes, overcoming some problems in electrolytes, electrodes, and electrolytic cells. Special focus is given to future development directions for current associated processing obstacles.

熔融盐是用于化学反应，能量转移和存储的极佳介质。应开发熔融盐创新技术，以从二次资源中回收金属并从主要自然资源中储备金属。在这些技术中，熔融盐电解是一种从废料中提取金属的经济且环保的方法。从熔盐特性的角度，应全面阐述熔盐在化学，电化学，能量和储热中的应用。这篇评论讨论了熔融盐电解的研究和开发的进一步方向，以及将其用于从各种金属废料（例如磁铁废料，核废料和硬质合金废料）中回收金属的方法。注意力集中在针对不同的含金属废物的各种电解方法的开发上，以克服电解质，电极和电解池中的一些问题。对于当前相关的处理障碍，将特别关注未来的发展方向。