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Technological Innovations of Carbon Dioxide Injection in EAF-LF Steelmaking

  • Green Steelmaking Technologies
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Abstract

In this study, the recent innovations and improvements in carbon dioxide (CO2) injection technologies for electric arc furnace (EAF)-ladle furnace (LF) steelmaking processes have been reviewed. The utilization of CO2 in the EAF-LF steelmaking process resulted in improved efficiency, purity and environmental impact. For example, coherent jets with CO2 and O2 mixed injection can reduce the amount of iron loss and dust generation, and submerged O2 and powder injection with CO2 in an EAF can increase the production efficiency and improve the dephosphorization and denitrification characteristics. Additionally, bottom-blowing CO2 in an EAF can strengthen molten bath stirring and improve nitrogen removal, while bottom-blowing CO2 in a LF can increase the rate of desulfurization and improve the removal of inclusions. Based on these innovations, a prospective process for the cyclic utilization of CO2 in the EAF-LF steelmaking process is introduced that is effective in mitigating greenhouse gas emissions from the steelmaking shop.

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Acknowledgements

The authors thank the National Nature Science Foundation of China (Nos. 51474024, 51734003, 51334001, 51574021 and 51604022) for their support.

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Authors and Affiliations

  1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Guangsheng Wei, Rong Zhu, Xuetao Wu, Kai Dong & Runzao Liu

  2. Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials, University of Science and Technology Beijing, Beijing, 100083, China

    Guangsheng Wei, Rong Zhu & Kai Dong

  3. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China

    Lingzhi Yang

Authors
  1. Guangsheng Wei
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  2. Rong Zhu
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  3. Xuetao Wu
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  4. Kai Dong
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  5. Lingzhi Yang
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  6. Runzao Liu
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Corresponding authors

Correspondence to Rong Zhu or Lingzhi Yang.

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Wei, G., Zhu, R., Wu, X. et al. Technological Innovations of Carbon Dioxide Injection in EAF-LF Steelmaking. JOM 70, 969–976 (2018). https://doi.org/10.1007/s11837-018-2814-3

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  • DOI: https://doi.org/10.1007/s11837-018-2814-3

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