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Influence of Reducing Gas Injection Methods on Pulverized Coal Combustion in a Medium Oxygen-Enriched Blast Furnace

  • Computational Modeling in Pyrometallurgy
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Abstract

Medium oxygen-enriched blast furnaces that utilize reducing gas injections are a feasible new ironmaking process that can significantly reduce the coke ratio and carbon dioxide emissions. To better inject the reducing gas into the blast furnace, two injection methods were designed in this study, and the effects of the reducing gas on the combustion of pulverized coal in three types of medium oxygen-enriched processes were studied using a three-dimensional lance-blowpipe-tuyere-raceway model. The reducing gas was injected into the blowpipe from a sleeve spray lance, which was suitable for injecting a small amount of reducing gas. The optimal coal burnout was 6% higher than that of a traditional blast furnace (TBF). The reducing gas was also directly injected into the raceway from a spray lance, which was suitable for injecting a large amount of reducing gas. The optimal coal burnout was 13% higher than that of a TBF using this system.

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Acknowledgements

The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. U1960205) and State Key Laboratory of Advanced Metallurgy (No. 41618029), University of Science and Technology Beijing.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, People’s Republic of China

    Xing Peng, Jingsong Wang, Cong Li, Haibin Zuo, Guang Wang, Xuefeng She & Qingguo Xue

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  1. Xing Peng
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  2. Jingsong Wang
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Correspondence to Jingsong Wang.

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Peng, X., Wang, J., Li, C. et al. Influence of Reducing Gas Injection Methods on Pulverized Coal Combustion in a Medium Oxygen-Enriched Blast Furnace. JOM 73, 2929–2937 (2021). https://doi.org/10.1007/s11837-021-04812-w

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  • DOI: https://doi.org/10.1007/s11837-021-04812-w

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