Abstract:The comprehensive utilization value of heavy metal solid waste is relatively high, but the industrialization feasibility of comprehensive utilization technologies developed in laboratory is relatively low. Referring to the “sulfidation-flotation” process, the sulfidation technology of heavy metals is the key to whether the process can be applied in the comprehensive utilization of solid waste. Based on the introduction of surface sulfidation, mechanical sulfidation, hydrothermal sulfidation, sulfidation precipitation, sulfidation roasting technology and their application in natural minerals, this paper summaries the applicability and research status of the five sulfidation technologies in the comprehensive utilization of heavy metal solid waste(mainly including waste residue, fly ash and plating sludge). Further, the article discusses the advantages and disadvantages of the five sulfidation technologies, and pointed out that different sulfidation technologies should be selected for solid waste with different physical and chemical properties; Finally, the article concludes that the development direction of sulfidation technology is to clarify the relationship between the sulfide properties and floatability, determine the influencing factors of sulfidation rate, and master the control technology of sulfide crystal structure and surface properties.