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Diffusion Coefficients and Structural Parameters of Molten Slags

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Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016

Abstract

This paper presents the results of two experimental studies on diffusion of SiO2 in “silicomanganese” (SiO2-MnO-CaO-Al2O3- MgO) slag and CaO in calcium aluminosilicate slag. The diffusivity of SiO2 was measured in the temperature range of 1400–1550 °C; while the diffusivity of CaO was determined at 1430–1600°C. The effects of additives on the chemical diffusivities of SiO2 and CaO were also examined. Addition of CaO and MnO to the silicomanganese slag increased silica diffusivity, while addition of SiO2 and Al2O3 slowed it down. Addition of TiO2 and MnOx to the aluminosilicate slag increased the diffusivity of CaO, while the addition of SiO2 had a negative effect on the diffusivity of CaO. Analysis of diffusivity in relation to the structure of silicate melts demonstrated a good correlation between diffusion coefficients of SiO2 and CaO and NBO/T (non-bridging oxygen per tetrahedrally coordinated atom).

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Author information

Authors and Affiliations

  1. School of Materials Science and Engineering, the University of New South Wales, Sydney, NSW, 2052, Australia

    Samane Maroufi, Sharif Jahanshahi & Oleg Ostrovski

  2. Flow Technology Department, SINTEF Materials and Chemistry, Norway

    Shahriar Amini

Authors
  1. Samane Maroufi
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  2. Shahriar Amini
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  3. Sharif Jahanshahi
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  4. Oleg Ostrovski
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Editor information

Editors and Affiliations

  1. The University of Alabama, USA

    Ramana G. Reddy (Conference Chair) (Conference Chair)

  2. Global R&D, ArcelorMittal USA, USA

    Pinakin Chaubal (Co-chair) (Co-chair)

  3. Carnegie Mellon University, USA

    P. Chris Pistorius (Co-chair) (Co-chair)

  4. Boston University, USA

    Uday Pal (Co-chair) (Co-chair)

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© 2016 TMS (The Minerals, Metals & Materials Society)

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Maroufi, S., Amini, S., Jahanshahi, S., Ostrovski, O. (2016). Diffusion Coefficients and Structural Parameters of Molten Slags. In: Reddy, R.G., Chaubal, P., Pistorius, P.C., Pal, U. (eds) Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-48769-4_52

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