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Deep Steel Desulfurization during Chamber Degassing

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Russian Metallurgy (Metally) Aims and scope

Abstract

The rather long period of processing deoxidized steel in a chamber degasser is often combined with metal desulfurization. The results of degassing of ultralow-sulfur pipe steel under a refining slag in a 180-ton steel-teeming ladle are presented. The influence of such factors as a decrease in the melt temperature and changes in the phase chemical composition and the slag mass on the desulfurization parameters is analyzed. At the end of degassing, the equilibrium partition ratio of sulfur between slag and metal is shown to decrease significantly, and the actual partition ratios of sulfur approach the equilibrium one. During vacuum treatment, a decrease in the sulfur content is detected both in the slag and in the metal. The element partition balance between the slag and the metal shows that the decrease in the sulfur content in the slag is caused by an increase in its mass and a decrease in the total sulfur content in the slag–metal system. The influence of the deoxidized-steel degassing conditions on the degree of sulfur removal from the slag into the gas phase is estimated.

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Notes

  1. From here on, the element contents are given in wt %.

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Authors and Affiliations

  1. Vyksa Branch, National University of Science and Technology MISiS, Vyksa, Russia

    V. M. Safonov

  2. Vyksa Steel Works, Vyksa, Russia

    V. A. Murysev & D. V. Morov

  3. Donetsk National Technical University, Donetsk, Ukraine

    E. L. Korzun

Authors
  1. V. M. Safonov
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  2. V. A. Murysev
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  3. E. L. Korzun
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  4. D. V. Morov
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Corresponding authors

Correspondence to V. M. Safonov or E. L. Korzun.

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Translated by K. Shakhlevich

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Safonov, V.M., Murysev, V.A., Korzun, E.L. et al. Deep Steel Desulfurization during Chamber Degassing. Russ. Metall. 2021, 874–882 (2021). https://doi.org/10.1134/S0036029521070120

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  • DOI: https://doi.org/10.1134/S0036029521070120

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