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Solubility of SC2O3 in NA3ALF6-K3ALF6-ALF3 Melts

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6th International Symposium on High-Temperature Metallurgical Processing

Abstract

The electrolyte with high solubility for Sc2O3 is very important to realize the preparation of Al-Sc master alloy by the molten salt electrolysis. The solubility of Sc2O3 in K3AlF6-Na3AlF6-AlF3 melts is determined with an isothermal saturation method. The effects of KR (ratio of K3AlF6 to K3AlF6+Na3AlF6), the concentration of Al2O3 and the temperature on the solubility of Sc2O3 are also investigated. The results indicate that the solubility of Sc2O3 in K3AlF6-Na3AlF6-AlF3 melts increases and then decreases with KR increasing. The solubility of Sc2O3 is 8.698 wt.% in (K3AlF6-Na3AlF6)(KR25%)-18 wt.%AlF3 melts at 940°C. The effect of temperature on the solubility is little, and the values are 8.575 wt.% and 8.762 wt.% respectively when the temperatures are 930°C and 960°C. The solubility decreases from 8.809 wt.% to 7.058 wt.% as the concentration of Al2O3 increases from 1.5 wt.% to 5.0 wt.% at 950°C.

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Author information

Authors and Affiliations

  1. School of Metallurgy and Environment, Central South University, Changsha, 410083, China

    Zhongliang Tian, Xun Hu, Yanqing Lai, Shu Yang, Shaolong Ye & Jie Li

Authors
  1. Zhongliang Tian
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  2. Xun Hu
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  3. Yanqing Lai
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  4. Shu Yang
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  5. Shaolong Ye
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  6. Jie Li
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Editor information

Editors and Affiliations

  1. School of Minerals Processing & Bioengineering, Central South University, China

    Tao Jiang (dean) (dean)

  2. Materials Science and Engineering, Michigan Technological University, USA

    Jiann-Yang Hwang B.S., M.S., Ph.D. (Professor, Chief Energy and Environment Advisor) (Professor, Chief Energy and Environment Advisor)

  3. Wuhan Iron and Steel Group Company, China

    Jiann-Yang Hwang B.S., M.S., Ph.D. (Professor, Chief Energy and Environment Advisor) (Professor, Chief Energy and Environment Advisor)

  4. Extractive and Processing Division, The Minerals, Metals & Materials Society (TMS), USA

    Gerardo R. F. Alvear F. Ph.D. (chair of the Pyrometallurgy Committee, TMS representative) (chair of the Pyrometallurgy Committee, TMS representative)

  5. Istanbul Technical University (ITU), Turkey

    Onuralp Yücel Ph.D.

  6. Research and Development Center, Wuhan Iron and Steel (Group) Corporation, China

    Xinping Mao Ph.D. (Doctoral Supervisor and Professor, Executive Vice-President) (Doctoral Supervisor and Professor, Executive Vice-President)

  7. University of California, Berkeley, USA

    Hong Yong Sohn Ph.D.

  8. ArcelorMittal Global R&D, East Chicago Laboratories, USA

    Naiyang Ma B.S., M.S., Ph.D. (adjunct associate professor) (adjunct associate professor)

  9. University of New South Wales, Australia

    Phillip J. Mackey Ph.D. (consulting metallurgical engineer and specialist in non-ferrous metals) (consulting metallurgical engineer and specialist in non-ferrous metals)

  10. Midrex Technologies, Pineville, North Carolina, USA

    Thomas P. Battle (Senior Metallurgist) (Senior Metallurgist)

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© 2015 TMS (The Minerals, Metals & Materials Society)

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Tian, Z., Hu, X., Lai, Y., Yang, S., Ye, S., Li, J. (2015). Solubility of SC2O3 in NA3ALF6-K3ALF6-ALF3 Melts. In: Jiang, T., et al. 6th International Symposium on High-Temperature Metallurgical Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-48217-0_14

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