Experimental Study of Synthesizing Mullite from High-Alumina Fly Coal Ash

详细信息   

• 责任者：Chen Jiangfeng (The State Key Laboratory of Coal Resources and Safety Mining of China ; China University of Mining and Technology ; Beijing 100083 ; China) ; Shao Longyi
• 刊名：Acta Mineralogica Sinica
• 出版年：2008
• 卷期：28(2)
• 关键词：粉煤灰 ; powdered coal ashes ; 莫来石 ; mullite
• 页码：p.191-195
• 图表：1 illlus., 3 tables, 8 refs.
• 分类号：1002
• issnNo：ISSN1000-4734
• isbnNo：CN52-1045/P

摘要

In this paper, M50 mullite was derived directly from high-alumina fly ash, M60 and M70 mullites from the high-alumina fly ash and industrial alumina mixtures were prepared. The physical properties of the sintered mullites could come up to the standard values of sintered mullite of China (YB/T5267-2005). The cost of synthesizing mullite from the high-alumina fly coal ash was largely reduced because of decreasing amount of industrial alumina in preparing mullite. The experimental results showed that the profitable sintering temperature is 1 400 ℃ for the as-received fly ash in preparing low trademark mullite (M50);and 1 500 ℃ for the beneficiated fly ash and/or in preparing high trademark mullite (M60 and M70), respectively.