研究了以氧化铝和石墨为原料真空氯化亚铝歧化法提取铝的条件，包括反应温度、预反应和冷凝器的结构。结果表明：在1643~1843 K的温度范围内，氧化铝与碳的反应程度随着反应温度的升高而提高，但铝的提取率首先随着反应温度的升高而提高，在1743 K时达到最高，继续升高反应温度，铝的提取率反而降低；氧化铝与碳进行预反应可以提高金属铝的提取率；金属铝与CO的接触面积越小、冷凝温度越低，C、Al4C3和Al2O3杂质的含量越低，这取决于冷凝器的结构。%The extraction conditions of aluminum by the disproportionation process of AlCl in vacuum were investigated using alumina and graphite as raw materials, including reaction temperature, pre-reaction and condenser structure. The results show that the extent of the reaction between alumina and carbon increases with increasing reaction temperature at 1643−1843 K; however, the extraction rate of aluminum increases firstly, and reaches the highest at 1743 K, and then decreases with rise in reaction temperature. The pre-reaction of alumina and carbon increases the extraction rate of aluminum. The impurities C, Al4C3 and Al2O3 in the aluminum product are reduced with reducing the contact surface of the aluminum with CO and with decreasing the condensation temperature, depending on the structure of the condenser.
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