Physicochemical properties of KF-NaF-AlF3 molten electrolytes

Аписаров, А. П.; Dedyukhin, Alexander; Redkin, Alexander; Tkacheva, Olga; Zaikov, Yu. P.

doi:10.1134/s1023193510060066

Cited by 49 publications

(36 citation statements)

References 4 publications

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“…Among four obtained results, three results are in good agreement with that reported by Yang et al, [15] but some deviation was found between our results and the results reported by Apisarov et al [16] (Table IV).…”

Section: Resultssupporting

confidence: 87%

“…Yang et al [15] reported the alumina solubility in KF-NaF-AlF 3 -based electrolyte only with NaF ranging from 0 to 8 mol pct at 973 K (700°C). Apisarov et al [16] measured alumina solubility in KF-NaF-AlF 3 -based electrolyte at the CRt = 1.3 and 1.5 at 973 K, 1023 K, and 1073 K (700°C, 750°C, and 800°C) [most of the measurements were done at 1073 K (800°C)], and regression equations were given to calculate alumina solubility in the KF-NaF-AlF 3 system in CRt range from 1.3 to 3.0 depending on the concentration of the components and temperature.…”

Section: Introductionmentioning

confidence: 98%

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Alumina Solubility in KF-NaF-AlF3-Based Low-Temperature Electrolyte

Yan

Yang

et al. 2011

Metall Mater Trans B

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based electrolyte is a promising low-temperature electrolyte for aluminum reduction. Alumina solubility in molten KF-NaF-AlF 3 -based electrolyte was determined as a function of the melt composition and temperature by measuring the weight loss of a rotating corundum disk and by using a LECO RO500 oxygen analyzer (LECO Corporation, St. Joseph, MI). The investigated temperature range is 1023 K to 1073 K (750°C to 800°C), and the total cryolite molar ratio (CRt = ([KF] + [NaF])/[AlF 3 ]) is 1.3 to 1.5; the content of NaF ranges from 0 mol pct to 50 mol pct. The effect of temperature, CaF 2 , and LiF on alumina solubility is discussed as well.

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 98%

Alumina Solubility in KF-NaF-AlF3-Based Low-Temperature Electrolyte

Yan

Yang

et al. 2011

Metall Mater Trans B

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“…The substitution of sodium by potassium in the system allows a temperature drop between 10 and 280°C depending on the AlF 3 concentration. It has been also claimed that it increases the alumina solubility 1,[4][5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Structural, Dynamic, and Thermodynamic Study of KF–AlF₃ Melts by Combining High-Temperature NMR and Molecular Dynamics Simulations

et al. 2019

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Molten cryolite (NaF-AlF 3) plays a key role for aluminum production since it is used as a solvent. Among the various leads to improve the electrochemical processes, adding other fluoride salts is one of the most promising. However there is very few data on the impact of these additional species on the physico-chemical properties of the melt. In order to fill this gap we investigate the properties of high temperature KF-AlF 3 liquids by combining NMR spectroscopy, molecular dynamics and DFT calculations. Our results show that the speciation, and consequently the transport properties differ from that of cryolite. This work will allow to assess the interest of adding KF in aluminium production processes.

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“…The electrolytes on the base of potassium cryolite possess much higher alumina solubility. [4][5][6] Therefore, the potassium cryolite with a low CR was suggested as a basic component of a low-temperature electrolyte for aluminum electrolysis. [7,8] The supposed operating temperature interval is 1023 K to 1173 K (750°C to 850°C), which corresponds to the KF-NaFAlF 3 electrolyte compositions at CRs of 1.3 to 1.7.…”

Section: Introductionmentioning

confidence: 99%