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System Assessment of Carbon Dioxide Used as Gas Oxidant and Coolant in Vanadium-Extraction Converter

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Abstract

With the aim of reducing carbon dioxide (CO2) emissions and of using waste resources in steel plants, the use of CO2 as a gas oxidant and coolant in the converter to increase productivity and energy efficiency was investigated in this study. Experiments were performed in combination with thermodynamic theory on vanadium-extraction with CO2 and oxygen (O2) mixed injections. The results indicate that the temperature of the hot metal bath decreased as the amount of CO2 introduced into O2 increased. At an injection of 85 vol.% O2 and 15 vol.% CO2, approximately 12% of additional carbon was retained in the hot metal. Moreover, the content of vanadium trioxide in the slag was higher. In addition, the O2 consumption per ton of hot metal was reduced by 8.5% and additional chemical energy was recovered by the controlled injection of CO2 into the converter. Therefore, using CO2 as a gas coolant was conducive to vanadium extraction, and O2 consumption was reduced.

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Acknowledgements

The authors deeply appreciate the financial support received from the National Natural Science Foundation of China (Project No. 51334001), which made this research possible.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, People’s Republic of China

    Wei Tong Du, Yu Wang & Xiao Ping Liang

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  1. Wei Tong Du
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  2. Yu Wang
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  3. Xiao Ping Liang
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Correspondence to Xiao Ping Liang.

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Du, W.T., Wang, Y. & Liang, X.P. System Assessment of Carbon Dioxide Used as Gas Oxidant and Coolant in Vanadium-Extraction Converter. JOM 69, 1785–1789 (2017). https://doi.org/10.1007/s11837-017-2463-y

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  • DOI: https://doi.org/10.1007/s11837-017-2463-y

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