Dissolution Reaction of Earthy Graphite in Liquid Steel

  • Hongyan Yan
  • Xiaojun HuEmail author
  • Chao Luo
  • Jinglong Liang
  • KuoChih Chou
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


Earthy graphite is an abundant natural resource with a high content of fixed carbon. It can be considered as a carbon source for steel carburizers. Also, it can reduce the production cost of enterprises. The study is aimed to clarify the kinetics of dissolution reaction and the carbon increase effect. The experiments were carried out by quartz tube sampling at 1873 K, with 0.1 and 0.4% theoretical carbon increase. Effect of added amount on S, N and O content in steel was studied. The results indicated that carbon increase effect was equivalent to some company carbon additives. The added amount of earthy graphite has little influence on S, N and O content. Considering the carbon oxidation reaction consumption during carbon dissolution process, a dynamic model was obtained and the reaction rate constant of the carbon dissolution reaction was calculated.


Earthy graphite Dissolution Kinetics Liquid steel 



This work was supported by the National Natural Science Foundation of China (No. 51334001, No. 51804126, No. 51474019), Natural Science Foundation of Hebei Province (No. E2018209266) and Natural Science Foundation of Tangshan city (No. 17110208a).


  1. 1.
    Wang YM, Han CH, Wang F (2005) Study on molding techniques of graphite-like carbon additive for steel-making. Ganshu Technol 27(1):9–10Google Scholar
  2. 2.
    Sun XC, Qu YF (2000) Development of a new carburizing agent for steel-making-a kind of semi-graphite. Rock Miner Anal 19(2):112–115Google Scholar
  3. 3.
    Zhou WP (1989) EAF steelmaking used earthy graphite carbon. Southern Steel 4:9–21Google Scholar
  4. 4.
    Chen SH, Wei B, Long LX (2008) Application of carburization material on production of cast iron. Foundry Technol 29(6):823–826Google Scholar
  5. 5.
    Li CE, Brown TC (2001) Carbon oxidation kinetics from evolved carbon oxide analysis during temperature-programmed oxidation. Carbon 5(39):725–732CrossRefGoogle Scholar
  6. 6.
    Khanna R, McCarthy F, Sun H et al (2005) Dissolution of carbon from coal-chars into liquid iron at 1550 °C. Metall Mater Trans B 36(6):719–729CrossRefGoogle Scholar
  7. 7.
    Dahlke VO, Knacke O (1955) The dissolution of carbon in liquid iron. Arch Eisenhuttenwes 26:373–378Google Scholar
  8. 8.
    Wu C, Sahajwalla V (2000) Dissolution rates of coals and graphite in Fe-CS melts in direct ironmaking: Influence of melt carbon and sulfur on carbon dissolution. Metall Mater Trans B 31(2):243–251CrossRefGoogle Scholar
  9. 9.
    Kosaka M, Minowa S (1968) On the rate of dissolution of carbon into molten Fe-C alloy. Trans Iron Steel Inst Jap 8(6):392–400Google Scholar
  10. 10.
    Swisher JH, Turkdogan ET (1967) Decarburization of iron-carbon melts in CO2-CO atmospheres-kinetics of gas-metal surface reactions. Aime Met Soc Tran 239(5)Google Scholar
  11. 11.
    Baker LA, Warner NA, Jenkins AE (1967) Decarburization of a levitated iron droplet in oxygen. Aime Met Soc Trans 239(6):857–864Google Scholar
  12. 12.
    Robertson DGC, Jenkins AE (1970) Reaction of liquid iron and its alloys in pure oxygen. Plenum Press, New York, pp 393–408Google Scholar
  13. 13.
    Zong JH, Yoon JK (1990) Theoretical interpretation of the decarburization mechanism in convective oxygen steelmaking. Metall Trans B 21(1):49–57CrossRefGoogle Scholar
  14. 14.
    Meyer HW, Porter WF, Smith GC et al (1968) Slag-metal emulsions and their importance in BOF steelmaking. J Met 20(7):35–42Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Hongyan Yan
    • 1
  • Xiaojun Hu
    • 2
    Email author
  • Chao Luo
    • 3
  • Jinglong Liang
    • 1
  • KuoChih Chou
    • 2
  1. 1.College of Metallurgy and EnergyNorth China University of Science and TechnologyTangshanChina
  2. 2.State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology BeijingHaidian District, BeijingChina
  3. 3.Hesteel Group Tangsteel CompanyTangshanChina

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