The traditional process of alumina production by acid method was to neutralize the aluminum chloride solution obtained by acid leaching for preparing aluminum hydroxide, and then calcined to produce alumina. This process not only had many processes, but also had high energy consumption. In this paper, the properties of alumina prepared by pyrolysis of aluminum chloride solution were studied by chemical composition analysis, XRD and SEM. Thermodynamics of the pyrolysis process was analyzed. The effects of temperature and time on the pyrolysis properties of aluminum chloride solution were investigated. The results showed that it would be completely feasible according to thermodynamic calculation of the pyrolysis reactions of aluminum chloride solution. Meanwhile with the increasing of temperature and pyrolysis time, the residual chlorine content decreased gradually, and the particle size of the product decreased and tended to be uniform. The prolongation of pyrolysis time promoted the pyrolysis process of aluminum chloride solution and contributed to the formation of Al₂O₃ phase.

酸法生产氧化铝的传统工艺是中和酸浸制得的氯化铝溶液，制备氢氧化铝，然后煅烧生产氧化铝。该过程不仅有很多过程，而且能耗很高。本文通过化学成分分析，XRD和SEM研究了氯化铝溶液热解法制备氧化铝的性能。分析了热解过程的热力学。研究了温度和时间对氯化铝溶液热解性能的影响。结果表明，根据热力学计算计算氯化铝溶液的热解反应是完全可行的。同时随着温度和热解时间的增加，残余氯含量逐渐降低，产物的粒径减小并趋于均匀。热解时间的延长促进了氯化铝溶液的热解过程，并促进了Al的形成。₂ O ₃相。