Direct spray pyrolysis of aluminum chloride solution for alumina preparation
来源期刊：中南大学学报(英文版)2014年第12期
论文作者：Lü Guo-zhi(吕国志) ZHANG Ting-an(张廷安) WANG Long(王龙) MA Si-da(马思达) DOU Zhi-he(豆志河) LIU Yan(刘燕)
文章页码：4450 - 4455
Key words：spray pyrolysis; aluminum chloride solution; γ-Al2O3; phase transformation
Abstract: The effects of pyrolysis mode and pyrolysis parameters on Cl content in alumina were investigated, and the alumina products were characterized by XRD, SEM and ASAP. The experimental results indicate that the spray pyrolysis efficiency is higher than that of static pyrolysis process, and the reaction and evaporation process lead to a multi-plot state of the alumina products by spray pyrolysis. Aluminum phase starts to transform into γ-Al2O3 at spray pyrolysis temperature of 600 °C, which is about 200 °C lower than that of static pyrolysis process. The primary particle size of γ-Al2O3 product is 27.62 nm, and Cl content in alumina products is 0.38% at 800 °C for 20 min.
Lü Guo-zhi(吕国志), ZHANG Ting-an(张廷安), WANG Long(王龙), MA Si-da(马思达), DOU Zhi-he(豆志河), LIU Yan(刘燕)
(Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ore of Ministry of Education
(School of Materials and Metallurgy, Northeastern University), Shenyang 110004, China)
Abstract:The effects of pyrolysis mode and pyrolysis parameters on Cl content in alumina were investigated, and the alumina products were characterized by XRD, SEM and ASAP. The experimental results indicate that the spray pyrolysis efficiency is higher than that of static pyrolysis process, and the reaction and evaporation process lead to a multi-plot state of the alumina products by spray pyrolysis. Aluminum phase starts to transform into γ-Al2O3 at spray pyrolysis temperature of 600 °C, which is about 200 °C lower than that of static pyrolysis process. The primary particle size of γ-Al2O3 product is 27.62 nm, and Cl content in alumina products is 0.38% at 800 °C for 20 min.
Key words:spray pyrolysis; aluminum chloride solution; γ-Al2O3; phase transformation
