关键词: 铝电解质, 初晶温度, 密度, 电导率

Abstract: Liquidus temperature, density and electrical conductivity of the Na3AlF6-AlF3-Al2O3-CaF2-LiF-NaCl electrolyte system for aluminum electrolysis were measured. The effects of AlF3, Al2O3, LiF and NaCl concentrations on liquidus temperature, density and electrical conductivity of the electrolyte were analyzed in theory. Empirical equations for the concentration and temperature dependence of these parameters were developed on the basis of experimental data. The reliability of these equations was compared with regression equations published in the literature. The results showed that the liquidus temperature was reduced and the electrical conductivity was increased greatly by adding NaCl and LiF into the electrolyte. These data are useful for industry production of aluminum electrolysis, since they can provide a scientific basis for selecting suitable aluminum electrolyte composition.

Key words: aluminum electrolyte, liquidus temperature, density, electrical conductivity