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采用热力学分析及X射线衍射、扫描电子显微镜及能谱仪等方法与手段,系统研究了中真空条件下碳化铝与氯化铝的反应。通过热力学研究,在10～100 Pa,温度低于1773 K时,Al与C生成Al4C3的反应及Al4C3与AlCl3的反应满足反应发生的热力学条件。实验研究表明,Al4C3可以通过Al与C反应制得;在1773 K、10～100 Pa下,Al4C3与AlCl3可以发生反应,并在冷凝区得到金属铝,热力学研究与实验研究完全一致。在真空碳热-氯化法炼铝过程中存在着Al4C3与AlCl3发生的反应,其是氯化过程中的重要反应之一。
The reaction between aluminum carbide and aluminum chloride was systematically studied by means of thermodynamic analysis, X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. According to the thermodynamic study, the reaction of Al with C to Al4C3 and the reaction of Al4C3 with AlCl3 can meet the thermodynamic conditions of the reaction at 10-100 Pa and 1773 K. Experimental results show that Al4C3 can be prepared by the reaction of Al and C. At 1773 K and 10 ~ 100 Pa, Al4C3 and AlCl3 can react with each other, and metal aluminum can be obtained in the condensation zone. The thermodynamics and experimental studies are completely consistent. The reaction of Al4C3 with AlCl3 during the vacuum carbothermal-chlorination process is one of the important reactions in the chlorination process.