Abstract:Non-ferrous metallurgical slags generated during pyrometallurgical smelting of non-ferrous metals cause environmental pollution as a stockpile, but slags also have enormous potentials for waste heat recovery and valuable metal recycling. This paper systematically synthesized common and specific physicochemical characteristics of non-ferrous metallurgical slags. It focused on research progress, core principles, process optimization directions, technical advantages, and application bottlenecks of waste heat recovery technologies for three typical slags (copper slag, ferronickel slag, and lead slag), which were classified into physical methods and chemical methods, and summarized research hotspots and development trends of each technology. Physical methods were centered on synergistic technology of granulation and heat exchange, while chemical methods focused on synergistic recovery of waste heat and resources. Cascaded recovery system integrating the two is the main development direction in the future. This paper provided theoretical reference and technical support for industrial upgrading and green development of waste heat recovery technologies for non-ferrous metallurgical slags.