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Evaluation of Mold Flux for Continuous Casting of High-Aluminum Steel

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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

Study of mold fluxes for continuous casting of high-aluminum steel has attracted increasing attention due to severe reaction between aluminum in liquid steel and silica in the flux which results in changes in composition, properties and performance of the flux and adversely affects slab quality. This research began with sampling during the casting process of high-Al nonmagnetic steel 20Mn23AlV to evaluate potential problems. A mold flux was developed in which SiO2 was partially replaced with Al2O3. Different compositions including CaO/Al2O3, fluoride-free and low-fluoride lime-alumina-based fluxes were evaluated with respect to their influence on flux viscosity, crystallization and subsequent effects on steel quality. It was concluded that mold flux with CaO/Al2O3 ratio in the range 1.1 to 1.6 and characterized by low viscosity, low initial crystallization temperature and good heat transfer properties was appropriate for casting of high-aluminum steel. A viscosity model with high reliability in predicting the viscosity of mold flux containing high Al2O3 was also established.

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Author information

Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Toronto, Ontario, Canada, M5S 3E4

    Wei Yan, Alexander McLean, Yindong Yang & Mansoor Barati

  2. State Key Laboratory of Advanced Metallurgy, University of Science and Technology, Beijing, 100083, China

    Wei Yan & Weiqing Chen

Authors
  1. Wei Yan
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  2. Alexander McLean
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  3. Yindong Yang
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  4. Weiqing Chen
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  5. Mansoor Barati
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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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Yan, W., McLean, A., Yang, Y., Chen, W., Barati, M. (2016). Evaluation of Mold Flux for Continuous Casting of High-Aluminum Steel. 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_30

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