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

  • Zhuolin Liu
  • Ting-an ZhangEmail author
  • Liping Liu
  • Guozhi Lyu
  • Yi Luo
  • Zhihe Dou
  • Xijuan Pan
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


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.


CO2 Decarburization and vanadium protection Thermodynamics FactSage 



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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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • Zhuolin Liu
    • 1
  • Ting-an Zhang
    • 1
    Email author
  • Liping Liu
    • 1
  • Guozhi Lyu
    • 1
  • Yi Luo
    • 1
  • Zhihe Dou
    • 1
  • Xijuan Pan
    • 1
  1. 1.Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education, Special Metallurgy and Process Engineering InstituteSchool of Metallurgy of Northeastern UniversityShenyangChina

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