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Optimization of the Slag Composition in Ladle Treatment of Steel for Increasing the Resistance of Refractories and Promoting Slag Reuse

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Metallurgist Aims and scope

Methods of ladle furnace slag stabilization are analyzed. It is shown that increasing the Al2O3 content of slag to higher than 18% results in chemical stabilization of slag. It is revealed that if the Al2O3 content is less than 30 wt.%, the refining properties of the slag do not degrade. When that content is exceeded, Al2O3 behaves similarly to SiO2, i.e., reduces the desulfurization ability of slag and makes it more corrosion aggressive. The most favorable content of Al2O3 in slag is from 12 to 25%, the properties of slag varying from basic to acidic. If the Al2O3 content is higher than 14%, the probability of formation of MgO–Al2O3 refractory spinel on the surface of refractory products increases, thereby increasing the durability of ladles and vacuum chambers.

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References

  1. A. M. Bigeev and V. A. Bigeev, Metallurgy of Steel, MGTU, Magnitogorsk (2000).

  2. A. A. Metelkin, O. Yu. Sheshukov, I. V. Nekrasov, and O. I. Shevchenko, Improving the Lining Resistance of Ladle Furnaces, NTI (filial) UrFU, Nizhny Tagil (2017).

  3. O. Yu. Sheshukov, M. A. Mikheenkov, I. V. Nekrasov, et al., Issues of Recycling Refining Slags in Steelmaking, NTI (filial) UrFU, Nizhny Tagil (2015).

  4. D. A. Dyudkin, S. Yu. Bat’, S. E. Grinberg, and S. N. Marintsev, Furnace-Ladle Steelmaking, Yugo-Vostok Ltd., Donetsk (2003).

  5. Slag Atlas, Committee for Fundamental Metallurgy of the Verin Deutscher Eisenhürrenleute, Verlag Stahleisen, Düsseldorf (1981).

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Acknowledgements

This paper has been prepared in line with State task No. 0396–2015–0083.

The contribution of senior research fellow L. A. Ovchinnikova and junior research fellow D. A. Lobanov (Institute of Metallurgy, Ural Division of the Russian Academy of Sciences) is acknowledged.

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Authors and Affiliations

  1. Institute of Metallurgy, Ural Division of the Russian Academy of Sciences, Ekaterinburg, Russia

    O. Yu. Sheshukov, M. A. Mikheenkov, I. V. Nekrasov & D. K. Egiazar’yan

  2. Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg, Russia

    O. Yu. Sheshukov

  3. Nizhny Tagil Technological Institute, Branch of Ural Federal University, Nizhny Tagil, Russia

    A. A. Metelkin

Authors
  1. O. Yu. Sheshukov
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  2. M. A. Mikheenkov
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  3. I. V. Nekrasov
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  4. A. A. Metelkin
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  5. D. K. Egiazar’yan
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Corresponding author

Correspondence to O. Yu. Sheshukov.

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Translated from Metallurg, Vol. 62, No. 8, pp. 9–12, August, 2018.

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Sheshukov, O.Y., Mikheenkov, M.A., Nekrasov, I.V. et al. Optimization of the Slag Composition in Ladle Treatment of Steel for Increasing the Resistance of Refractories and Promoting Slag Reuse. Metallurgist 62, 723–728 (2018). https://doi.org/10.1007/s11015-018-0714-y

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  • DOI: https://doi.org/10.1007/s11015-018-0714-y

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