Thermodynamics on formation of C, Al_4C_3 and Al_2O_3 in AlCl disproportionation process in vacuum to produce aluminum

作     者：冯月斌 杨斌 戴永年 Yue-bin FENG;Bin YANG;Yong-nian DAI

作者机构：昆明理工大学理学院昆明650500 昆明理工大学冶金与能源工程学院真空冶金国家工程实验室昆明650093 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2014年第24卷第10期

页      面：3366-3371页

核心收录：

学科分类：080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：Project(51364020)supported by the National Natural Science Foundation of China 

主　　题：Al AlCl Al2O3 Al4C3 disproportionation vacuum 

摘      要：The formation conditions of C, Al4C3 and Al2O3 in the Al Cl disproportionation process in vacuum to produce aluminum was investigated by thermodynamics analysis. It is demonstrated that the required temperatures for the reactions to form these impurities, the disproportionation of CO and the reactions of metallic aluminum with CO, decrease with decreasing pressure. The lg pCO-1/T diagram of metallic aluminum-CO system agrees with the experimental results, indicating that the reaction rate is very high and this system in vacuum is approximately in equilibrium; therefore, the equilibrium diagram can be used to predict the possible reactions in this system in vacuum.