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Volume 43 Issue 11
Nov.  2025
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Article Contents
WEI Jingjing, LU Guanghua, WANG Huigang, XIA Chun. Research progress of hot metal desulfurization and treatment and utilization of desulfurization slag in iron and steel enterprises[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(11): 142-151. doi: 10.13205/j.hjgc.202511016
Citation: WEI Jingjing, LU Guanghua, WANG Huigang, XIA Chun. Research progress of hot metal desulfurization and treatment and utilization of desulfurization slag in iron and steel enterprises[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(11): 142-151. doi: 10.13205/j.hjgc.202511016

Research progress of hot metal desulfurization and treatment and utilization of desulfurization slag in iron and steel enterprises

doi: 10.13205/j.hjgc.202511016
  • Received Date: 2025-04-18
  • Accepted Date: 2025-06-12
  • Rev Recd Date: 2025-05-25
  • Available Online: 2026-01-09
  • Hot metal pre-desulfurization has become an indispensable key process in modern iron and steel enterprises, and desulfurization slag is the main solid waste generated in the desulfurization process, with an annual output of 10 to 20 million tons. Therefore, the treatment and utilization of desulfurization slag generated in the desulfurization process are important issues of concern of steel enterprises. Based on these, this paper first introduces the desulfurization mechanism of different desulfurizers and identifies the possible chemical composition of desulfurization slag by analyzing the reaction process. After that, the chemical and phase compositions of desulfurization slag are comprehensively reviewed, to lay a foundation for the following utilization. Finally, the research progress on reuse and high value-added utilization of desulfurization slag in steel mills is summarized. The result shows that the properly treated desulfurization slag has multiple values, which can not only recover the metal iron, but also replace lime for steelmaking, and the tailings can also realize the utilization of building materials. In addition, desulfurization slag also shows great potential in ion adsorption for heavy metal polluted wastewater and using as rubber filler.
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