粉煤灰综合利用与提质技术研究进展

粉煤灰是我国堆积量最大的固体废弃物之一，粉煤灰的堆积和外排不仅占用了大量土地资源，而且容易造成环境污染。粉煤灰中含有一定量的残碳、磁珠和微珠等有用组分和有价元素，根据粉煤灰的特性对其进行提质或综合利用对减少环境污染、提高粉煤灰经济效益具有重要意义。论文阐述了粉煤灰在建材制备、陶瓷生产、土壤改良和多孔材料制造等领域的综合利用现状及研究进展，介绍了分选脱碳、有价元素提取、有用组分分离等粉煤灰提质方法的研究现状，探讨了粉煤灰综合利用与提质方法存在的问题及发展趋势。建议根据不同粉煤灰的特性，进一步开展粉煤灰材料制备的研究，同时强化对粉煤灰中微量元素、稀有元素和其它高附加值组分的回收。 

Research Progress on Comprehensive Utilization and Upgrading Technologies of Fly Ash

As one of the largest solid waste in China, the stockpiling and discharge of fly ash occupied a large amount of land sources and caused environmental problems. There are a certain amount of valuable components such as residual carbon, magnetic beads, microbeads and valuable elements. It is of great significance to improve the economic benefits by comprehensive utilization according to the characteristics of fly ash after upgrading. The comprehensive utilization and research progress in building materials, ceramic products, soil improvement and porous materials was stated. And the research progress of fly ash upgrading methods such as decarbonization by separation, valuable elements extraction and valuable components separation were also introduced; and the problems and development trends of fly ash comprehensive utilization and upgrading were discussed. Further research on materials and valuable element and components extraction should conducted based on the characteristics of the fly ash.