粉煤灰提取氧化铝的研究现状

Progress in the Technology of Extracting Aluminum Oxide from Fly Ash

粉煤灰中氧化铝质量分数可达15%～40%,是制备氧化铝的有效资源。综述了近年来从粉煤灰中制备氧化铝的工艺和进展,主要分为酸浸取法,碱焙烧法,(NH4)2SO4焙烧法。分别从各制备工艺的特点和存在的问题等方面进行了简要的评述,并对其发展趋势进行了阐述。

The mass fraction of alumina in fly ash can be up to 15%-40%, which was a very good resource for preparing alumina. The preparation processes of extracting alumina from fly ash were introduced, which were mainly acid extraction method, alkaline sintering method and （NH4）2SO4 sintering method. The brief comments were made on the process features and shortcomings, and the development trend was also summerized.