LIQUIDUS TEMPERATURES OF Na3AlF6 -AlF3-CaF2-KF-LiF-Al2O3 MELTS

  • Jianping PENG Northeastern University, China

Abstract


ABSTRACT: Temperatures for the primary crystallization of Na3AlF6-AlF3-CaF2-KF-LiF-Al2O3 system adopted in aluminum electrolysis process were determined by thermal analysis. An empirical equation was derived to describe the liquidus temperatures for the primary crystallization of this multicomponent electrolyte system: t /℃=1011 + 0.7w(AlF3) - 0.232w(AlF3)2 - 7.65w(Al2O3) + 0.523w(Al2O3)2 - 8.96w(LiF) + 0.043w(LiF)2 - 3.32w(KF) - 0.12w(KF)2 - 3.28w(CaF2) +0.037w(CaF2)2 + 0.091w(AlF3)w(LiF) + 0.074w(AlF3)w(KF) + 0.084w(AlF3)w(CaF2) - 0.27w(Al2O3)w(LiF), where w(AlF3) denotes the mass fraction of excess aluminum fluoride with respect to cryolite. While w(Al2O3) ranges from 2% to 4%, w(LiF), w(KF) and w(CaF2) from 0 to 7%, and the molar ratio of NaF/AlF3 from 2.2 to 3.

Author Biography

Jianping PENG, Northeastern University, China

I earned doctor degree in Nonferrous metallurgy in 2009.

As be a lecturer, I works in northeastern University now.

Fields of research: Aluminum electrolysis

 

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Published
2014/06/15
How to Cite
PENG, J. (2014). LIQUIDUS TEMPERATURES OF Na3AlF6 -AlF3-CaF2-KF-LiF-Al2O3 MELTS. Journal of Mining and Metallurgy, Section B: Metallurgy, 50(1), 23-26. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/3984
Issue
Vol. 50 No. 1 (2014)
Section
Original Scientific Paper

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