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Experimental Evaluation of the Dissolution Rates of Ti and FeTi70 in Liquid Fe

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Abstract

During secondary steelmaking, improving alloy yield and engineering inclusion content require understanding and quantification of the alloy distribution in the melt. When additions are dropped in the melt, a steel shell solidifies around them. After this shell has melted, the alloy is spread in the melt. The influence of process parameters on the duration of the shell period for Ti and FeTi70 additions has been experimentally evaluated. For Ti, the melt temperature and the initial addition size were varied and for FeTi70, only the melt temperature was varied. By continuously measuring the apparent weight of submerged samples with a load cell, the shell period and the amount of molten alloy within the shell were determined. The shell period increases at lower superheats and for larger sample sizes. For a certain size of Ti additions, the molten content within the shell increases with increasing shell period. The importance of this period, relative to the total dissolution time, increases at lower superheats. All investigated FeTi70 samples may melt completely within the shell. While the shell period lasts longer for FeTi70 than for the corresponding Ti samples, this fast internal melting yields a net reduction in total dissolution time.

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Authors and Affiliations

  1. Department of Metallurgy and Materials Engineering, KU Leuven, Heverlee, Belgium

    Lieven Pandelaers (Research Manager), Patrick Wollants (Professor) & Bart Blanpain (Professor)

  2. ArcelorMittal Gent, Ghent, Belgium

    Diane Barrier (Process Engineer)

  3. ArcelorMittal Research and Development, Maizières-lès-Metz, France

    Pascal Gardin (Program Leader Exploratory & Knowledge Building)

Authors
  1. Lieven Pandelaers
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  2. Diane Barrier
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  3. Pascal Gardin
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  4. Patrick Wollants
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  5. Bart Blanpain
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Corresponding author

Correspondence to Lieven Pandelaers.

Additional information

Manuscript submitted May 29, 2012.

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Pandelaers, L., Barrier, D., Gardin, P. et al. Experimental Evaluation of the Dissolution Rates of Ti and FeTi70 in Liquid Fe. Metall Mater Trans B 44, 561–570 (2013). https://doi.org/10.1007/s11663-013-9822-z

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  • DOI: https://doi.org/10.1007/s11663-013-9822-z

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