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<p>Sintering is the process that emits the most pollutants in ironmaking, including CO, SO<sub>2</sub>, NO<sub><i>x</i></sub>, and dioxins. Flue gas circulation sintering technology can not only reduce the emissions of various pollutants but also decrease the consumption of solid fuels. Therefore, it is necessary to summarize and discuss the research status of flue gas circulation technology. Firstly, the research status, advantages, and disadvantages of five typical flue gas circulation processes and their effects on the emission of different pollutants were analyzed. Then, the impact of O<sub>2</sub>, CO, SO<sub>2</sub>, and temperature in the circulating gas during the sintering flue gas circulation process on the quality of sinter and their reasonable ranges was summarized, and the formation mechanisms of CO<sub><i>x</i></sub>, NO<sub><i>x</i></sub>, SO<sub>2</sub>, and dioxins during the sintering process were discussed. Furthermore, the optimization and improvement of flue gas circulation technology in recent years were introduced. Finally, issues related to element enrichment, equipment improvements, and fine particulate matter emissions in the flue gas circulation process were reviewed, providing a reference for the optimal application of flue gas circulation sintering technology in the future.</p>

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Progress and future development direction of energy-saving and pollution reduction technology for sintering flue gas circulation

  • 期刊论文

  • 发表日期：

    2025年10月9日

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  • Yan-bing Zong,
  • Yu Zhang,
  • Jian-liang Zhang,
  • Yao-zu Wang,
  • Zheng-jian Liu

摘要

Sintering is the process that emits the most pollutants in ironmaking, including CO, SO2, NOx, and dioxins. Flue gas circulation sintering technology can not only reduce the emissions of various pollutants but also decrease the consumption of solid fuels. Therefore, it is necessary to summarize and discuss the research status of flue gas circulation technology. Firstly, the research status, advantages, and disadvantages of five typical flue gas circulation processes and their effects on the emission of different pollutants were analyzed. Then, the impact of O2, CO, SO2, and temperature in the circulating gas during the sintering flue gas circulation process on the quality of sinter and their reasonable ranges was summarized, and the formation mechanisms of COx, NOx, SO2, and dioxins during the sintering process were discussed. Furthermore, the optimization and improvement of flue gas circulation technology in recent years were introduced. Finally, issues related to element enrichment, equipment improvements, and fine particulate matter emissions in the flue gas circulation process were reviewed, providing a reference for the optimal application of flue gas circulation sintering technology in the future.