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<p>This study investigated the effect of aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) additives on the properties of NaF-AlF<sub>3</sub>-SiO<sub>2</sub> melts. The liquid-phase line temperature was determined through thermal analysis, while the solubility and volatilization loss of silicon dioxide (SiO<sub>2</sub>) were evaluated using the rotating quartz disk method and volatilization experiments. The dissolution mechanism of Al<sub>2</sub>O<sub>3</sub> in the melt was explored through thermodynamic analysis and experimental validation. The results indicated that Al<sub>2</sub>O<sub>3</sub> addition significantly decreased liquid-phase line temperature, enhanced SiO<sub>2</sub> solubility, and reduced volatilization losses. These findings provide a theoretical basis for optimizing the electrolysis process of Al–Si alloys, which contribute to improved melt performance, enhanced energy efficiency, and reduced volatilization losses, thereby promoting increased efficiency in industrial applications.</p>

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Thermophysical and Chemical Properties of NaF-AlF3-SiO2 Melts with Al2O3 Addition for Al-Si Alloy Production

  • 期刊论文

  • 发表日期：

    2025年4月17日

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  • Yonghui Yang,
  • Chao Fan,
  • Pengchen Yang,
  • Zhanwei Liu,
  • Hengwei Yan

摘要

This study investigated the effect of aluminum oxide (Al2O3) additives on the properties of NaF-AlF3-SiO2 melts. The liquid-phase line temperature was determined through thermal analysis, while the solubility and volatilization loss of silicon dioxide (SiO2) were evaluated using the rotating quartz disk method and volatilization experiments. The dissolution mechanism of Al2O3 in the melt was explored through thermodynamic analysis and experimental validation. The results indicated that Al2O3 addition significantly decreased liquid-phase line temperature, enhanced SiO2 solubility, and reduced volatilization losses. These findings provide a theoretical basis for optimizing the electrolysis process of Al–Si alloys, which contribute to improved melt performance, enhanced energy efficiency, and reduced volatilization losses, thereby promoting increased efficiency in industrial applications.