Skip to main content
SpringerLink
Log in

Phase Equilibria in the System “FeO”-CaO-SiO2-Al2O3-MgO at Different CaO/SiO2 Ratios

  • Published:
Metallurgical and Materials Transactions B Aims and scope Submit manuscript

Abstract

The “FeO”-containing slags play an important role in the operation of an ironmaking blast furnace (BF), in particular the primary slags such as the system “FeO”-CaO-SiO2-Al2O3-2 mass pct MgO with CaO/SiO2 weight ratios of 1.3, 1.5, and 1.8 saturated with metallic iron. To investigate the characteristics of such a slag system and its behavior in BF, the phase equilibria and liquidus temperatures in the slag system have been experimentally determined using the high-temperature equilibration and quenching technique followed by an electron probe X-ray microanalysis (EPMA). Isotherms between 1553 K and 1603 K (1280 °C and 1330 °C) were determined in the primary phase fields of dicalcium silicate, melilite, spinel, and monoxide [(Mg,Fe2+)O]. Pseudo-ternary phase diagrams of (CaO + SiO2)-Al2O3-“FeO” with a fixed MgO concentration at 2 mass pct and at CaO/SiO2 ratios of 1.3, 1.5, and 1.8 have been discussed, respectively, simplifying the complexity of the slag system for easy understanding and applying in BF operation. It was found that the liquidus temperatures increase in melilite and spinel primary phase fields, but decrease in dicalcium silicate and monoxide primary phase fields with increasing Al2O3/(CaO + SiO2) ratio. In addition, the liquidus temperatures decrease with increasing “FeO” concentration in dicalcium silicate and melilite primary phase fields, while showing an increasing trend in the spinel and monoxide primary phase fields. The data resulted from this study can be used to improve and optimize currently available database of thermodynamic models used in FactSage.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11

Similar content being viewed by others

References

  1. M. Hino, T. Nagasaka, A. Katsumata, K.I. Higuchi, K. Yamaguchi, N. Kon-No, Metall. Trans. B 30B, 671–83 (1999)

    Article  Google Scholar 

  2. M. Matsumura, M. Hoshi, T. Kawaguchi, ISIJ Int. 45, 594–602 (2005)

    Article  Google Scholar 

  3. V. Shatokha, O. Velychko, High Temp. Mater. Proc. 31, 215–20 (2012)

    Article  Google Scholar 

  4. X. Ma, G. Wang, S. Wu, J. Zhu, B. Zhao, ISIJ Int. 55, 2310–17 (2015)

    Article  Google Scholar 

  5. X. Ma, D. Zhang, Z. Zhao, T. Evans, B. Zhao, ISIJ Int. 56, 513–19 (2016)

    Article  Google Scholar 

  6. M. Kou, S. Wu, X. Ma, L. Wang, M. Chen, Q. Cai, B. Zhao, Metall. Trans. B 47B, 1093–02 (2016)

    Article  Google Scholar 

  7. K. Jang, X. Ma, G. Wang, S. Wu, J. Zhu, B. Zhao, ISIJ Int. 56, 967–76 (2016)

    Article  Google Scholar 

  8. K. Jang, X. Ma, G. Wang, S. Wu, J. Zhu and B. Zhao: ISIJ Int. (In Press). doi:10.2355/isijinternational.ISIJINT-2016-342.

  9. A.K. Biswas, Principles of Blast Furnace Ironmaking: Theory and Practice (Cootha Publishing House, Brisbane, 1981), p. 329

    Google Scholar 

  10. M. Geerdes, R. Chaigneau, I. Kurunov, Modern Blast Furnace Ironmaking: An Introduction, 3rd edn. (IOS Press, Amsterdam, 2015), p. 59

    Google Scholar 

  11. M. Hayashi, K. Suzuki, Y. Maeda, T. Watanabe, ISIJ Int. 55, 1223–31 (2015)

    Article  Google Scholar 

  12. K. Yamaguchi, H. Ueno, T. Kawaguchi, S. Matsunaga, H. Oda, S. Amano, ISIJ Int. 34, 964–72 (1994)

    Article  Google Scholar 

  13. K. Higuchi, M. Naito, M. Nakano, Y. Takamoto, ISIJ Int. 44, 2057–66 (2004)

    Article  Google Scholar 

  14. M. Hayashi, K. Suzuki, Y. Maeda, T. Watanabe, ISIJ Int. 56, 220–25 (2016)

    Article  Google Scholar 

  15. K. Jang, X. Ma, G. Wang, S. Wu, J. Zhu and B. Zhao: Proc. of 10th CSM Steel Congress and the 6th Baosteel Biennial Academic Conference, Metallurgical Industry Press, Shanghai, 2015, p. 0707.

  16. V.D. Eisenhuttenleute, Slag Atlas (Verlag Sthaleisen GmbH, Düsseldorf, 1995), pp. 156–60

    Google Scholar 

  17. N.L. Bowen, J.F. Schairer, Am. J. Sci. 24, 177–213 (1932)

    Article  Google Scholar 

  18. N.L. Bowen, J.F. Schairer, E. Posnjak, Am. J. Sci. 26, 193–284 (1933)

    Article  Google Scholar 

  19. N.L. Bowen, J.F. Schairer, E. Posnjak, Am. J. Sci. 25, 273–94 (1933)

    Article  Google Scholar 

  20. W.C. Allen, R.B. Snow, J. Am. Ceram. Soc. 38, 264–72 (1955)

    Article  Google Scholar 

  21. N.L. Bowen, J.F. Schairer, Am. J. Sci. 29, 151–217 (1935)

    Article  Google Scholar 

  22. J.F. Schairer, K. Yagi, Am. J. Sci. 245, 193–204 (1947)

    Article  Google Scholar 

  23. A. Muan, E.F. Osborn, Phase Equilibria among Oxides in Steelmaking (Addison-Wesley, New York, 1951), p. 325

    Google Scholar 

  24. D.P. Kalmanovitch and J. Williamson: Proc. ACS Symp. Ser. 301, American Chemical Society, Washington DC, 1986, pp. 234–255.

  25. D.P. Kalmanovitch, A. Sanyal, J. Williamson, J. Inst. Energy 59, 20–23 (1986)

    Google Scholar 

Download references

Acknowledgments

The authors would like to thank Baosteel through the Baosteel-Australia Joint Research and Development Centre (BAJC) for providing financial support for this project. The authors are also grateful to Mr Ron Rasch and Ms Ying Yu of the Centre for Microscopy and Microanalysis at UQ, who provided technical support for the EPMA facilities.

Author information

Authors and Affiliations

  1. The University of Queensland, St Lucia, QLD, 4072, Australia

    Kyoung-oh Jang, Xiaodong Ma, Geoff Wang & Baojun Zhao

  2. Baoshan Iron and Steel (Baosteel) Co. Ltd, Shanghai, 201900, China

    Jinming Zhu & Haifa Xu

Authors
  1. Kyoung-oh Jang
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Xiaodong Ma
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Jinming Zhu
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Haifa Xu
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Geoff Wang
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Baojun Zhao
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Xiaodong Ma.

Additional information

Manuscript submitted September 23, 2016.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Jang, Ko., Ma, X., Zhu, J. et al. Phase Equilibria in the System “FeO”-CaO-SiO2-Al2O3-MgO at Different CaO/SiO2 Ratios. Metall Mater Trans B 48, 1547–1560 (2017). https://doi.org/10.1007/s11663-017-0955-3

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11663-017-0955-3

Keywords

Search

Navigation