粉煤灰提取氧化铝研究进展

Progress on Extraction of Alumina from Fly Ash

随着国民经济的快速发展,氧化铝需求量大幅度增加。与之相对的是,燃煤电厂排出的大量固体废弃物—粉煤灰,不仅侵占大量土地,而且严重污染环境,构成了对生态和环境的双重破坏。粉煤灰中一般都含有氧化铝,当粉煤灰中氧化铝含量达到40%以上时,从粉煤灰中提取氧化铝就有了可行性。文章综述了国内外粉煤灰中提取氧化铝的生产方法和技术发展概况。

With the rapid development of national economy, the demand of alumina has greatly increased. Instead, plenty of solid waste-fly ash was discharged by coal-fired power plants. It not only occupies a large amount of land but also seriously pollutes the environment, constituted the ecological and environmental has been damaged. Generally, alumina is contained in the fly ash. It is feasibility of extracting alumina from fly ash when it is over 40 %. The production methods and technology development of extract fly ash from alumina was reviewed in this paper