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Effect of MgO on Crystallization and Heat Transfer of Fluoride-Free Mold Fluxes

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Abstract

The effect of MgO on crystallization and heat transfer of fluoride-free mold fluxes was studied using single/double-hot thermocouple technique (SHTT/DHTT) and infrared emitter technique (IET), respectively. SHTT experiments demonstrated that the increase of MgO concentration promoted the crystallization tendency of mold fluxes. XRD analysis showed that the dominant phases changed from CaSiO3 to CaSiO3/Ca2MgSi2O7/Ca11Si4B2O22, and to Ca2MgSi2O7 as the MgO content was increased. The heat flux across mold flux disks was reduced from 671 to 615 kW/m2 in IET experiments when MgO concentration was increased from 0.9 to 4.9 mass pct.

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Acknowledgment

Financial support by Baosteel through the Baosteel-Australia Joint Research Centre, Abel Metal Services, and the Australian Research Council (ARC Linkage Project LP130100773) is gratefully acknowledged.

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Authors and Affiliations

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

    Jian Yang, Jianqiang Zhang, Yasushi Sasaki & Oleg Ostrovski

  2. Baosteel Group Corporation Research Institute, Shanghai, 201900, P.R. China

    Chen Zhang & Dexiang Cai

  3. Department of Energy Science and Technology, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan

    Yoshiaki Kashiwaya

Authors
  1. Jian Yang
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  2. Jianqiang Zhang
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  3. Yasushi Sasaki
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  5. Chen Zhang
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  7. Yoshiaki Kashiwaya
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Correspondence to Jianqiang Zhang.

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Manuscript submitted February 7, 2018.

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Yang, J., Zhang, J., Sasaki, Y. et al. Effect of MgO on Crystallization and Heat Transfer of Fluoride-Free Mold Fluxes. Metall Mater Trans B 49, 3097–3106 (2018). https://doi.org/10.1007/s11663-018-1380-y

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  • DOI: https://doi.org/10.1007/s11663-018-1380-y

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