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Metallurgical and Materials Transactions B

, Volume 49, Issue 5, pp 2174–2181 | Cite as

In Situ Observation of Crystallization in CaO-Fe2O3 System with Different Cooling Rates and Chemical Compositions Using Confocal Laser Scanning Microscope

  • Tae Jun Park
  • Joon Sung Choi
  • Dong Joon Min
Communication

The crystallization behaviors of the CaO-Fe2O3 system in the nonequilibrium state with different chemical compositions and cooling rates were investigated. In addition, the CCT and nonequilibrium phase diagram of CaO-Fe2O3 system were derived at various cooling rates. As the cooling rate increased, the nonequilibrium state of the CaO-Fe2O3 system moved in a left-downward direction as a whole. In addition, the Darken’s excess stability function was introduced in order to understanding the change of phase diagram phenomena.

Sinter ore is one of the main charge materials in Blast Furnace operation (BF). The productivity of BF is governed by the qualities of sinter ore such as reducibility and mechanical strength. As the properties of sinter ore mainly depend on mineralogy, understanding the mineralogical characteristics of sinter ore is necessary to design the optimal microstructure, especially that of Silico-Ferrite of Calcium and Aluminum (SFCA). However, owing to the complexity of the...

References

  1. 1.
    J.W. Jeon, S. Mo Jung and Y. Sasaki: ISIJ Int., 2010, vol. 50, pp. 1064–1070.CrossRefGoogle Scholar
  2. 2.
    T. Mukherjee and J.A. Whiteman: Ironmaking Steelmaking, 1985, vol. 12, pp. 151–55.Google Scholar
  3. 3.
    P.R. Dawson, J. Ostwald and K.M. Hayes: Trans. Inst. Min. Metall., 1985, vol. 94, pp. C71–78.Google Scholar
  4. 4.
    G.O. Egundebi and J.A. Whiteman: Ironmaking Steelmaking, 1989, vol. 16, pp. 379–385.Google Scholar
  5. 5.
    L. Lu, R. J. Holmes and J.R. Manuel: ISIJ Int., 2007, vol. 47, pp. 349–358.CrossRefGoogle Scholar
  6. 6.
    N.A.S. Webster, M.I. Pownceby, I.C. Madsen and J.A. Kimpoton: Metall. Mater. Trans. B., 2012, vol. 43, pp. 1344–1357.CrossRefGoogle Scholar
  7. 7.
    K. Kitamura, F. Shigemori, Y. Hatakeyama, T. Kawaguchi and K. Takata: AIME Ironmaking Proc., 1985, vol. 44, pp. 405–414.Google Scholar
  8. 8.
    N.J. Bristow and A.G Waters (1991): Trans. Inst. Min. Metall., 100, 1–10.Google Scholar
  9. 9.
    I. Shigaki, M. Sawada and N. Gennai: Trans. ISIJ., 1986, vol. 26, pp. 503–511.CrossRefGoogle Scholar
  10. 10.
    C.E. Loo, K.T. Wan and V.R. Howes: Ironmaking Steelmaking., 1988, vol. 15, pp. 279–285.Google Scholar
  11. 11.
    N.V.Y. Scarlett, M.I. Pownceby, I.C. Madsen, and A.N. Christensen: Metall. Mater. Trans. B., 2004, vol. 35, pp. 929–936.CrossRefGoogle Scholar
  12. 12.
    N.A.S. Webster, M.I. Pownceby, I.C. Madsen, A.J. Studer, J.R. Manuel and J.A. Kimpoton: Metall. Mater. Trans. B., 2014, vol. 45, pp. 2097–2105.CrossRefGoogle Scholar
  13. 13.
    N.A.S. Webster, M.I. Pownceby and I.C. Madsen: ISIJ Int., 2013, vol. 53, pp. 1334–40.CrossRefGoogle Scholar
  14. 14.
    N.V.Y. Scarlett, I.C. Madsen, M.I. Pownceby and A.N. Christensen: J. Appl. Crystallogr., 2004, vol. 37, pp. 362–368.CrossRefGoogle Scholar
  15. 15.
    J.O. Edstrom: Jernkontorets Ann., 1956, vol. 140, pp. 101–115.Google Scholar
  16. 16.
    B. Phillips and A. Muan: Am. Ceram. Soc., 1958, vol. 41, pp. 445–54.CrossRefGoogle Scholar
  17. 17.
    Z. Wang, Y. Sun, S. Sridhar, M. Zhang and Z. Zhang: Metall. Mater. Trans. B., 2017, vol. 48, pp. 527–537.CrossRefGoogle Scholar
  18. 18.
    Z. Wang, Y. Sun, S. Sridhar, M. Zhang, M.Guo and Z. Zhang: Metall. Mater. Trans. B., 2015, vol. 46 (5), pp. 2246–2254.CrossRefGoogle Scholar
  19. 19.
    L.S. Darken: TMS-AIME., 1967, vol. 239, pp. 80–90.Google Scholar
  20. 20.
    C. Ding, X. LV, Y. Chen and C. Bai: ISIJ Int., 2016, vol. 56, pp. 1157–1163.CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

  • Tae Jun Park
    • 1
  • Joon Sung Choi
    • 1
  • Dong Joon Min
    • 1
  1. 1.Department of Materials Science and EngineeringYonsei UniversitySeoulRepublic of Korea

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