Abstract
Based on the step cooling curve method, continuously varying cell constant (CVCC) method, observation method, and carbon block sodium expansion rate determination method, the effects of KF content on liquidus temperature, conductivity, alumina solubility, and electrolysis expansion rate of cathode were studied. The results showed that the liquidus temperature decreased with the increase in KF content. For every 1% increase of KF, the liquidus temperature decreased by about 1.83 ℃. The conductivity increased with the increase of superheat, and the average conductivity increased by 0.009 S/cm for every 1 ℃ increase in superheat. Under the same superheat, the conductivity increased by 0.033 S/cm for every 1% decrease in KF. Under the same superheat, KF content had little effect on the dissolution rate of alumina. The electrolysis expansion rate of the cathode carbon block increased with the increase in the KF content. The purpose of this work was to study the effect of KF content on the physical and chemical properties of aluminum electrolyte, and to provide a theoretical basis for the selection of appropriate electrolyte composition in aluminum electrolysis industry.
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References
Jan H, Thonstad J (2004) Electrical conductivity of low-melting electrolytes for aluminium smelting. Journal of the electrochemical society 49: 5111–5114.
Zhang L, Chen JS, Li BC, Han Q, Liu KR (2018) Effect of NaCl and LiF on the liquidus temperature of K3AlF6-Na3AlF6-AlF3 and solubility of Al2O3. Light metals (11):36–39.
Chen SY, Guo HL (2017) Effect of potassium fluoride on liquidus temperature of aluminum electrolyte. Light metals 2017(04):20–23.
Huang YG, Lai YQ, Tian ZL, Li QY (2007) Methods for measuring electrical conductivity of high temperature molten salts. Light metals (10):33–37.
Wang ZW, Hu XW, Gao BL, Shi ZN (2006) Application of measuring electrical conductivity of cryolite-based melts by CVCC technique. Journal of northeastern university (natural science) (07):786–789.
Wang XW, Ray DP, Alton TT (1993) A multiple regression equation for the electrical conductivity of cryolitic melts. Light metals. Warrendale: Minerals, metals & materials society, 247–255.
Wang JQ, Li CL, Zhou YF, Fang B, Qiu SL, Wang YF, Luo LF (2020) Electrical conductivity of complex electrolyte systems for aluminum electrolysis. World nonferrous metals (15):206–208.
Fellner P, Kobbelt O, Stereten A. (1993) Electrical conductivity of molten cryolite-based binary mixtures obtained with a tube-type cell made of pyrolytic boron nitride. Electrochemical acta 38(4): 589–592.
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© 2023 The Minerals, Metals & Materials Society
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Li, C. et al. (2023). KF Content on Physical and Chemical Properties of Aluminum Electrolysis Electrolyte. In: Broek, S. (eds) Light Metals 2023. TMS 2023. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-22532-1_97
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DOI: https://doi.org/10.1007/978-3-031-22532-1_97
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