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Study on the foaming of CaO-SiO2-FeO slags: Part I. Foaming parameters and experimental results

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Abstract

In order to understand the effect of slag composition on foaming in iron and steelmaking processes, slag foaming was quantitatively studied for CaO-SiO2-FeO slags in the temperature range of 1250 °C to 1400 °C. It was found that slag foaming could be characterized by a foaming index (Σ), which is equal to the retention or traveling time of the gas in the slag, and the average foam life ( τ). The effects of P2O5, S, MgO, and CaF2 on foaming were studied. As expected, slag foaming increased with increasing viscosity and decreasing surface tension. It was found that suspended second-phase solid particles such as CaO, 2CaO SiO2, and MgO stabilized the foam and had a larger effect on foaming than changes in viscosity and surface tension for the slags studied.

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Authors and Affiliations

  1. Research Institute of Mineral Dressing and Metallurgy, Tohoku University, Sendai, Japan

    Kimihisa Ito

  2. Department of Metallurgical Engineering and Materials Science, Carnegie Mellon University, 15213, Pittsburgh, PA

    R. J. Fruehan (Professor)

Authors
  1. Kimihisa Ito
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  2. R. J. Fruehan
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Kimihisa Ito, Research Associate, formerly with the Department of Metallurgical Engineering and Materials Science, Carnegie Mellon University

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Ito, K., Fruehan, R.J. Study on the foaming of CaO-SiO2-FeO slags: Part I. Foaming parameters and experimental results. Metall Trans B 20, 509–514 (1989). https://doi.org/10.1007/BF02654600

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  • DOI: https://doi.org/10.1007/BF02654600

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