Acta Metallurgica Sinica (English Letters)

, Volume 31, Issue 1, pp 48–54 | Cite as

Evolution Behavior of γ-Al3.5FeSi in Mg Melt and a Separation Method of Fe from Al–Si–Fe Alloys

  • Tong GaoEmail author
  • Zeng-Qiang Li
  • Yao-Xian Zhang
  • Xiang-Fa LiuEmail author


The recycling of high Fe-content Al–Si alloys is a green industry. Eliminating the harmful effect of Fe, achieving the separation of Al and Fe is one of the key problems. Different from traditional methods for iron removal, a novel method using magnesium melt to separate Al and Fe is proposed. By introducing Al–14Si–5Fe alloy into Mg melt, it was found that the γ-Al3.5FeSi phase evolves to Al3SiFe3.5 and Al5Fe2 through the melting and solidification process. Compared with the primary Al-rich γ-Al3.5FeSi phase, the formation of Fe-rich Al3SiFe3.5 is quite beneficial for the separation of Al and Fe. Mg–Si–Al and Mg–Si–Fe alloys can be obtained at the top and bottom of the cooled ingot, respectively. The results in this study provide meaningful suggestions for recycling scrap Al–Si–Fe materials.


Al–Si–Fe Mg melt Fe-rich phase evolution Separation 



This research was financially supported by the National Natural Science Foundation of China (No. 51601106), the Fundamental Research Funds of Shandong University, and China Postdoctoral Science Foundation (No. 2016M600536).


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Copyright information

© The Chinese Society for Metals and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of EducationShandong UniversityJinanChina

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