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An Investigation on Inclusions Forming During Remelting of Aluminum and Magnesium Scraps Under a Salt Flux

  • Pyrometallurgical Techniques Driving Recycling and the Circular Economy
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Abstract

Due to increasing environmental and economic concerns, the recycling of metals has been increasing in the last decades. Aluminum saves up to 95% of energy when recycled, and magnesium is one of the most common alloying elements in aluminum alloys, contributing to oxidation behavior. Both aluminum and magnesium have a high oxidation tendency during remelting, which raises the necessity for salt flux usage. Salt fluxes remove oxides and other surface contaminants from the target metal. Salt fluxes allow molten metal pieces to coagulate and form the molten bath. Furthermore, it prevents further oxidation of the metal. The presence of fluorides increases the metal yield by promoting coalescence. Although metals and salts are frequently interacting in such processes, there is still a lack of knowledge of the final and intermediate products of the interaction reactions. This study aims to contribute to the literature by investigating the interaction of aluminum and magnesium scraps with salt flux. As a result of the experiments, AlF3, MgF2, Al2O3, MgO, and MgAl2O4 were observed as the main phases in the aluminum and magnesium scraps dross. The presence of CaF2 in the salt flux, which is insoluble in water, was also observed in the analysis results. In addition, fluorine-containing compounds were observed as a result of chemical interactions among the F-, K-, and oxide layers.

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References

  1. P.E. Tsakiridis, J. Hazard. Mater. 217–218, 1–10 https://doi.org/10.1016/j.jhazmat.2012.03.052 (2012).

    Article  Google Scholar 

  2. Global Aluminium Recycling: a cornerstone of sustainable development, International Aluminium Institute (IAI), London, (2009), pp. 1–36.

  3. M. E. Schlesinger, Aluminium Recycling, 2nd ed., (2013), pp. 1–85.

  4. Y. Xiao, M.A. Reuter, and U. Boin, J. Environ. Sci. Health Part A Toxic/Hazard. Subst. Environ. Eng. https://doi.org/10.1080/10934520500183824 (2005).

    Article  Google Scholar 

  5. Y. Yang and M. A. Reuter, in Extraction and Processing Division Meeting on Recycling and Waste Treatment in Mineral and Metal Processing: Technical and Economic Aspects, (2002), pp. 527–537.

  6. Y. Yang, Y. Xiao, B. Zhou, and M. A. Reuter, in Proceedings of the John Floyd International Symposium :Sustainable Developments in Metals Processing, Melbourne, July 3–6, (2005), pp. 251–263.

  7. A. Vallejo-Olivares, S. Høgåsen, A. Kvithyld, and G. Tranell, J. Sustain. Metall. 8(4), 1485 https://doi.org/10.1007/s40831-022-00612-x (2022).

    Article  Google Scholar 

  8. L.F. Zhang, and T. Dupont, Mater. Sci. Forum 546–549, 25–36 https://doi.org/10.4028/www.scientific.net/msf.546-549.25 (2007).

    Article  Google Scholar 

  9. S. Gül, R. Dittrich, and B. Friedrich, in Proceedings of EMC (2013), pp.1–7.

  10. S. Akbari and B. Friedrich, , in International Workshop on Metal-Slag Interaction, Yalta, Crimea – Ukraine, (2010), pp. 67–92.

  11. L. Martin-Gar In, A. Dinet, and J. M. Hicter, J. Mater. Sci. 2366 (1979).

  12. R.R. Roy, J. Ye, and Y. Sahai, Mater. Trans. JIM 38(6), 566–570 (1997).

    Article  Google Scholar 

  13. J.A.S. Tenorio, M.C. Carboni, D. Crocce, and R. Esinosa, J. Light Met. 1, 195–198 (2001).

    Article  Google Scholar 

  14. R.R. Roy, and Y. Sahai, Mater. Trans. JIM 38(6), 571–574 (1997).

    Article  Google Scholar 

  15. R. Bolivar, and B. Friedrich, World Metall. 62(6), 366–371 (2009).

    Google Scholar 

  16. A.H. Sully, H.K. Hardy, and T.J. Heal, J. Inst. Metals 82, 2 (1953).

    Google Scholar 

  17. J.H. Linden, D.L. Stewart, and Y. Sahai, in Second International Symposium, Recycling of Metals and Engineered Materials (1990).

  18. R.D. Peterson, in Second International Symposium on Recycling of Metals and Engineered Materials, TMS, Warrendale, PA, (1990), p. 85.

  19. J. Ye, and Y. Sahai, . Materi.Trans. JIM 37(9), 1479–1485 (1996).

    Article  Google Scholar 

  20. E.G. West, Trans. Inst. Weld. 4(50) (1941).

  21. J.H.L. Van Linden and D.L. Stewart, Light Metals 391 (1988).

  22. J. Courtenay and W. Schneider, Pyrotek Engineering and VAW Aluminium AG R&D (2000).

  23. C. Qiu, S.M. Opalka, O.M. Løvvik, and G.B. Olson, Calphad 32(4), 624–636 https://doi.org/10.1016/j.calphad.2008.08.005 (2008).

    Article  Google Scholar 

  24. R. Önen and M. Gökelma, in 10 th International Aluminnium Symposium, (2022), pp. 206–210.

  25. T. Hiraki, T. Miki, K. Nakajima, K. Matsubae, S. Nakamura, and T. Nagasaka, Materials 7(8), 5543–5553 https://doi.org/10.3390/ma7085543 (2014).

    Article  Google Scholar 

  26. I. Ansara, N. Dupin, H. L. Lukas, and B. Sundman, J. Alloys Compd. 20 (1997).

  27. Z. Zhu, Y. Du, L. Zhang, H. Chen, H. Xu, and C. Tang, J. Alloys Compd. 460(1–2), 632 https://doi.org/10.1016/j.jallcom.2007.06.033 (2008).

    Article  Google Scholar 

  28. P.M. Sathyaraj, K. Ravichandran, and T.S.N. Sankara Narayanan, J. Magn. Alloys 10(1), 295 https://doi.org/10.1016/j.jma.2021.06.005 (2022).

    Article  Google Scholar 

  29. D.L. Stewart, J.H.L. Van Linden, A.F. LaCamera, T.V. Pierce, J.O. Parkhill, J.M. Urbanic, T.R. Hornack, United States Patent, 5,057,194 (1991).

  30. J. Alberto, S. Tenorio, D. Crocce, and R. Espinosa, J. Light Metals 2(2), 89 (2002).

    Article  Google Scholar 

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Acknowledgements

This research was funded by the Scientific and Technological Research Council of Turkey (TÜBITAK) under the BIDEB-2232 program with grant number 118C311.Center for Materials Research at İzmir Institute of Technology is gratefully acknowledged for the sample analyses.

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  1. Department of Materials Science and Engineering, İzmir Institute of Technology, 35430, Izmir, Türkiye

    İrem Yaren Çapkın & Mertol Gökelma

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  1. İrem Yaren Çapkın
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Çapkın, İ.Y., Gökelma, M. An Investigation on Inclusions Forming During Remelting of Aluminum and Magnesium Scraps Under a Salt Flux. JOM 75, 4269–4274 (2023). https://doi.org/10.1007/s11837-023-06070-4

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  • DOI: https://doi.org/10.1007/s11837-023-06070-4

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