From Sulfide Flash Smelting to a Novel Flash Ironmaking Technology

  • Hong Yong Sohn


A novel flash ironmaking technology is under development at the University of Utah under the support of U.S. Department of Energy (DOE) and American Iron and Steel Institute (AISI). The history of the development from the conception of the idea to the current status will be discussed. The flash ironmaking process produces iron directly from fine iron ore concentrates without requiring cokemaking and pelletization/sintering, which will enable the technology to significantly reduce energy consumption and carbon dioxide emissions compared with blast furnace ironmaking. Unlike other gas-based ironmaking processes, this technology will not suffer from the problems of solid sticking and fusion. Current work is focused on the method of supplying the energy required to maintain the necessary temperature, as an intermediate step to determine the scalability for larger, industrial-scale pilot trials.


carbon dioxide coke concentrate energy flash ironmaking flow sheet hydrogen magnetite natural gas process simulation reformerless taconite 


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  1. 1.
    K.-H. Tacke and R. Steffen, Stahl und Eisen, 124 (4) (2004), 45.Google Scholar
  2. 2.
    H. Y. Sohn, Steel Times International May/June (2007), 68.Google Scholar
  3. 3.
    IISI, Steel Statistical Yearbook (2007). /pictures/publicationfiles/SSY2007.pdf.
  4. 4.
    C. P. Manning and R. J. Fruehan, JOM, 53 (10) (2001), 36.CrossRefGoogle Scholar
  5. 5.
    Lockwood Greene Technologies, “Ironmaking Process Alternatives Screening Study” (Report LG Job No. 010529.01, U.S. Department of Energy, 2000).Google Scholar
  6. 6.
    D. Macauley, Steel Times International, 21 (1) (1997), 20.Google Scholar
  7. 7.
    H. Y. Sohn et al., Iron & Steel Technology (AIST Trans.), 6(8) (2009), 158.Google Scholar
  8. 8.
    H. Y. Sohn and M. E. Choi, Collected Proceedings: Supplemental Proceedings: Vol. 1 Materials Processing and Properties, International Symposium on High-Temperature Metallurgical Processing, 139th TMS Annual Meeting, Seattle, WA, ed. J. Drelich et al. (Warrendale, PA: TMS, 2010), 347.Google Scholar
  9. 9.
    USGS, “2005 Minerals Yearbook — Iron Ore” (Report U.S. Department of the Interior, U.S. Geological Survey, 2007).Google Scholar
  10. 10.
    U.S. Energy Information Administration, Annual Energy Outlook 2011, /forecasts/aeo/index.cfm
  11. 11.
    Pittsburgh Post-Gazette (2011), /pg/l1202/1161933-503.stm; /analysis/studies/usshalegas/
  12. 12.
    M. E. Choi and H. Y. Sohn, NIronmaking and Steelmaking, 37 (2010), 81.CrossRefGoogle Scholar
  13. 13.
    H. Wang and H. Y. Sohn, Metall. Mater. Trans. B, 44B (2013), 133.CrossRefGoogle Scholar
  14. 14.
    N. Shigematsu and H. Iwai, ISIJ, International, 29(6) (1989), 486.CrossRefGoogle Scholar
  15. 15.
    P. W. Tasker, E. A. Colburn, and W. C. Mackrodt, J. Amer. Ceram. Soc, 68 (1985), 74.CrossRefGoogle Scholar
  16. 16.
    H. K. Pinegar, M. S. Moats, and H. Y. Sohn, Steel Res. Intl., 82 (8) (2011), 951.CrossRefGoogle Scholar
  17. 17.
    H. K. Pinegar, M. S. Moats, and H. Y. Sohn, Ironmaking Steelmaking, 39 (2012), 398.CrossRefGoogle Scholar
  18. 18.
    H. K. Pinegar, M. S. Moats, and H. Y. Sohn, Ironmaking Steelmaking, 40 (2013), 32.CrossRefGoogle Scholar
  19. 19.
    H. Y. Sohn and M. Olivas-Martinez, “Determination of Energy Requirements for Ironmaking Processes: It’s Not That Straightforward,” (Paper presented in Energy Education, Energy Technologies and Carbon Dioxide Management at TMS Annual Meeting, San Diego, CA, 2014).Google Scholar
  20. 20.
    H. K. Pinegar, M. S. Moats, and H. Y. Sohn, Ironmaking Steelmaking, 40 (2013), 44.CrossRefGoogle Scholar
  21. 21.
    H. Y. Sohn, M. E. Choi and M. Olivas-Martinez, Proceedings of 6th Intl Congress on Sci. and Tech. of Ironmaking (ICSTI ‘12), Oct. 14–18, 2012, Rio de Janeiro, Brazil, ISSN 2176–3135, Paper No. 22117 (2012), 460–468.Google Scholar

Copyright information

© TMS (The Minerals, Metals & Materials Society) 2014

Authors and Affiliations

  • Hong Yong Sohn
    • 1
  1. 1.Department of Metallurgical EngineeringUniversity of UtahSalt Lake CityUSA

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