Dynamics study of Al extraction from Al2O3 by Al sub-sulphidization

被引：0
|
作者：
Wu, Guoyuan [1 ]
Liu, Dachun [2 ]
Dai, Yongnian [2 ]
机构：
[1] Dept. of Mat. Sci. and Eng., Yunnan Univ., Kunming 650091, China
[2] Dept. of Metall., Kunming Univ. of Sci. and Technol., Kunming 650093, China
来源：
Zhenkong Kexue yu Jishu Xuebao/Vacuum Science and Technology | 2004年 / 24卷 / 04期
关键词：
Alumina - Diffusion - Optimization - Production - Reaction kinetics - Vaporization;
D O I：
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中图分类号：
学科分类号：
摘要：
The rather complicated dynamic process in Al extraction from Al2O3 by Al sub-sulphidization was studied to optimize the production conditions. The early stage is found to be dominated by interfacial reactions, whereas the final stage is strongly affected by diffusing. The activation energies at various stages were evaluated respectively. Though high temperature and low pressure significantly increase the reaction rate, serious volatilization of Al2S3 could be a problem. We suggest that a temperature above 1100°C and a pressure lower than 1333 Pa can result in higher reaction rates.
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页码：263 / 266
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