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Effect of the Injection Angle of Reducing Gas on Coal Flow and Combustion in a 50% Oxygen Blast Furnace

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12th International Symposium on High-Temperature Metallurgical Processing

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

Medium oxygen-enriched blast furnace that utilizes reducing gas injections is a feasible new ironmaking process that can significantly reduce the coke ratio and carbon dioxide emissions. In this study, a three-dimensional numerical model of lance–blowpipe–tuyere–raceway zone was established, which was used to study the influence of the reducing gas injection angle (30–70°) on the flow and combustion of pulverized coal in a new tuyere of the 50% oxygen blast furnace. As the injection angle increases, the tuyere kinetic energy first decreases and then increases, and the pulverized coal combustion efficiency increases. Compared with the injection at 30°, the coal particle temperature under the injection conditions of 70° at the raceway outlet increased by 326 K, and the char conversion ratio and the burnout increased by 27.4% and 22.4%, respectively. However, it is worth noting that under the high injection angle, local high temperature appears on the tuyere wall, which requires cooling to avoid damage to the tuyere in the actual blast furnace.

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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, Zhiyao Li, Haibin Zuo, Xuefeng She, Guang Wang & Qingguo Xue

Authors
  1. Xing Peng
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  2. Jingsong Wang
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  3. Zhiyao Li
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  4. Haibin Zuo
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  5. Xuefeng She
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  6. Guang Wang
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  7. Qingguo Xue
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Corresponding author

Correspondence to Jingsong Wang .

Editor information

Editors and Affiliations

  1. Central South University, Changsha, China

    Zhiwei Peng

  2. Michigan Technological University, Houghton, MI, USA

    Jiann-Yang Hwang

  3. Elkem Carbon Solutions, Kristiansand, Norway

    Jesse F. White

  4. Montana Technological University, Butte, MT, USA

    Jerome P. Downey

  5. RHI Magnesita, Leoben, Austria

    Dean Gregurek

  6. Jiangxi University of Science and Technology, Ganzhou, China

    Baojun Zhao

  7. Istanbul Technical University, Istanbul, Turkey

    Onuralp Yücel

  8. Atilim University, Ankara, Turkey

    Ender Keskinkilic

  9. Central South University, Changsha, China

    Tao Jiang

  10. King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia

    Morsi Mohamed Mahmoud

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Peng, X. et al. (2022). Effect of the Injection Angle of Reducing Gas on Coal Flow and Combustion in a 50% Oxygen Blast Furnace. In: Peng, Z., et al. 12th International Symposium on High-Temperature Metallurgical Processing. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-92388-4_26

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