Effect of CaF2 Additions on the Yield of AZ63 Magnesium Chips during Remelting

Author:

YÖRÜK Pınar1ORCID,GÖKELMA Mertol1ORCID

Affiliation:

1. İZMİR YÜKSEK TEKNOLOJİ ENSTİTÜSÜ

Abstract

Magnesium is one of the metals listed in European Union’s critical raw materials list. Primary production of magnesium is a high energy demanding process which raised the necessity of recycling the magnesium alloys in an efficient way. Remelting those scraps under a salt flux consist of chlorides (NaCl, KCl, and MgCl2) and fluorides (CaF2) are a common process however, different alloys might behave differently when it comes to salt-metal-metal oxide interactions. Furthermore, the condition of the salt flux such as dry-mixed or pre-melted (fused) affects the coagulation and metal yield. This work presents results on the effect of CaF2 concentration and pre-melting the salt flux on metal yield during remelting of chips. A yield up to 75% was observed in the case of remelting of chips under a fused salt flux with 5.5% CaF2 concentration.

Publisher

Black Sea Journal of Engineering and Science

Subject

General Medicine

Reference18 articles.

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2. Akbari S, Gökelma M, Friedrich B, Recycling M. 2009. Potential of minimizing magnesium losses in black dross through optimization of salt fluxes. In Proceedings of European Metallurgical Conference, June 28 - July 1, Innsbruck, Austria, pp: 1-19.

3. Çağlar Yüksel ÖT, Erzi E, Dışpınar D, Çiğdem M. 2017. Melt quality change with different fluxes in secondary A356 alloy. In Proceedings of European Congress and Exhibition on Advanced Materials and Processes, September 17-22, Athens, Greece, pp: 1-5.

4. Demirci G. 2006. Electrolytic magnesium production using coaxial electrodes. PhD thesis, Middle East Technical University, The Graduate School of Natural And Applied Sciences, Ankara, Türkiye, pp: 170.

5. Ding W, Gomez-Vidal J, Bonk A, Bauer T. 2019. Molten chloride salts for next generation CSP plants: Electrolytical salt purification for reducing corrosive impurity level. Solar Energy Mater Solar Cells, 199: 8-15.

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