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Thermodynamics Analysis on the Process of Decarburization and Vanadium Protection by CO2

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Rare Metal Technology 2018 (TMS 2018)

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

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Abstract

Due to the high energy consumption, long technical process, low usage rate of vanadium during the traditional smelting vanadium steel process, a new method for decarburization by CO2 to directly smelt vanadium-containing steel in blast furnace was proposed. In this paper, the thermodynamics of CO2 decarburization in molten iron process was calculated out by FactSage . The thermodynamic calculations indicated that in standard state, the transformation temperature of C and V was 1357 °C; the oxidation order of element was Si, C, V, Mn and S when using CO2 as oxidant. The experiment of blowing CO2 temperature showed that decarburization reaction temperature was 1550 °C, carbon content could be decreased to 0.676%, the decarburization rate was 88%. There was no effect on vanadium content in molten iron during the decarburization process, vanadium content was 0.323%, which meets the request of vanadium mould steel.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (51422403, 51774078), the Fundamental Research Funds for the Central Universities (N162505002) and National Basic Research Program of China (973 program, No. 2013CB632606).

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Authors and Affiliations

  1. Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education, Special Metallurgy and Process Engineering Institute, School of Metallurgy of Northeastern University, Shenyang, 110819, China

    Zhuolin Liu, Ting-an Zhang, Liping Liu, Guozhi Lyu, Yi Luo, Zhihe Dou & Xijuan Pan

Authors
  1. Zhuolin Liu
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  2. Ting-an Zhang
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  3. Liping Liu
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  4. Guozhi Lyu
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  5. Yi Luo
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  6. Zhihe Dou
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  7. Xijuan Pan
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Corresponding author

Correspondence to Ting-an Zhang .

Editor information

Editors and Affiliations

  1. The Pennsylvania State University, University Park, Pennsylvania, USA

    Hojong Kim

  2. Freeport-McMoRan, El Paso, Texas, USA

    Bradford Wesstrom

  3. University of Saskatchewan, Saskatoon, Saskatchewan, Canada

    Shafiq Alam

  4. Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

    Takanari Ouchi

  5. University of Toronto, Toronto, Ontario, Canada

    Gisele Azimi

  6. IND LLC, South Jordan, Utah, USA

    Neale R. Neelameggham

  7. Rio Tinto Kennecott Utah Copper Corp, South Jordan, Utah, USA

    Shijie Wang

  8. Watertown, Massachusetts, USA

    Xiaofei Guan

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Liu, Z. et al. (2018). Thermodynamics Analysis on the Process of Decarburization and Vanadium Protection by CO2 . In: Kim, H., et al. Rare Metal Technology 2018. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72350-1_24

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