Researchers have conducted a study on determining the saturated vapor pressures of various metallic substances within Al-Mg alloy to assess the feasibility of Mg separation. The study revealed that Mg has significantly higher vapor pressures compared to Al, making it easier to evaporate and separate from the alloy at lower temperatures. On the other hand, Al has a low saturation vapor pressure, making its evaporation more challenging. The study also explored the dynamics of the Volatility Distillation (VD) process for Al-Mg alloy, showing that as the distillation temperature increases, the maximum volatilization rate of each metal rises correspondingly. It was found that Mg has a much higher volatilization rate compared to Al, indicating that the initial phase of the VD process predominantly involves the evaporation of Mg. To predict the separation efficiency of the VD process, the activity coefficients of Al and Mg components in the liquid alloy were calculated using various models, with the NRTL model showing the best fitting with the experimental values. VLE diagrams were then employed to assess the efficacy of the VD process in separating impurities and purifying metals, demonstrating that VD can effectively separate Mg from Al-Mg alloys, resulting in high-purity Al. The study provides valuable insights into the thermodynamic properties of Al-Mg alloys and offers a strategic approach for the efficient recovery of Al, reduced energy consumption, and minimized processing time required for Al purification. This comprehensive investigation paves the way for further advancements in metal separation and purification processes.
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New Vacuum Distillation Technology for Producing Refined Aluminum from Aluminum-Magnesium Alloys
