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The Dissolution Kinetics of Al2O3 into Molten CaO-Al2O3-Fe2O3 Slag

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Abstract

The rotation cylinder method was used to investigate the dissolution kinetics of Al2O3 into molten CaO-Al2O3-Fe2O3 slag, and weight losses of the Al2O3 rod were selected as experimental variables. The final melt was milled into powders for XRF detection, and the Al2O3 rod with adhesive melt after experimental was examined by scanning electron microscopy and energy dispersive spectrometer. It is concluded that diffusion is the restricted step in Al2O3 dissolution into molten CaO-Al2O3-Fe2O3 slag; the chemical composition of the initial melts exerts a great influence on the activation energy for Al2O3 dissolution; the range of Al2O3 diffusivity is about 1.86 × 10−7 to 2.45 × 10−6 cm2/s; no apparent intermediate layer between the Al2O3 rod and melt is observed.

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Acknowledgments

The authors are especially grateful to National Natural Science Foundation of China (Grant No. 51104192).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Chongqing University, Chongqing, People’s Republic of China

    Shenglin Xiang (Master Student), Xuewei Lv (Assistant Professor), Bin Yu (Master Student), Jian Xu (Assistant Professor) & Jiaqing Yin (Master Student)

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  1. Shenglin Xiang
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  2. Xuewei Lv
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  3. Bin Yu
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Correspondence to Xuewei Lv.

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Manuscript submitted December 17, 2013.

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Xiang, S., Lv, X., Yu, B. et al. The Dissolution Kinetics of Al2O3 into Molten CaO-Al2O3-Fe2O3 Slag. Metall Mater Trans B 45, 2106–2117 (2014). https://doi.org/10.1007/s11663-014-0159-z

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