摘要
通过绘制气相存在下的Ｏ－Ｃ－Ａｌ系电位－温度平衡图，对Ａｌ２Ｏ３碳热还原制铝的可能性从热力学角度进行了探讨．结果表明，还原反应可能分三步进行．当气态ＣＯ的分压为１．０１３２５×１０５Ｐａ时，生成液相铝的温度为２３８１Ｋ，对应的电极电位相对于标准氧电极为－１５７９ｍＶ．在还原过程中，铝会有可观的蒸发损失．
Attempts to explore thermodynamically the possibility of production of carbothermal aluminium with E - T equilibrium diagram of the O-C-Al system in the presence of gaseous phase. The results indicate that the reducing reactions may include three steps.The producing temperature of liquid aluminium is 2381K and the corresponding potential versus standard oxygen electrode is - 1579mV under 1. 01325×105Pa partial pressure of carbon monoxide. During reducing process the reaction temperature must be controlled critically to decrease the evaporation losses of aluminium.
基金
山东省自然科学基金
关键词
氧化铝
碳热还原
热力学
电位
温度
平衡图
Chemical equilibrium
Aluminium oxide
Carbon thermoreduction
