The products of a high temperature reaction of fly ash with lime and soda

International Conference Building Materials, Products and Technologies

材料科学;工业技术（总论）

Beranova, D.^1 ; Galvankova, L.^1 ; Masilko, J.^1 ; Ptacek, P.^1

Brno University of Technology, Faculty of Chemistry, Institute of Material Chemistry, Purkyova 464/118, Brno

61200, Czech Republic^1

关键词: Alumina production;    Combustion pro-cess;    Dicalcium silicate;    High-temperature reaction;    Raw material sources;    Sintered materials;    Thermal power plants;    X-ray diffraction analyses (XRD);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/583/1/012026/pdf
DOI  :  10.1088/1757-899X/583/1/012026

来源: IOP

【 摘 要 】

A composition of coal combustion fly ash depends on a coal composition and conditions of a combustion process. The main components are SiO2 and Al2O3. An amount of Al2O3 in coal combustion fly ash is relatively high, about 30-40%, and for this reason, the fly ash could be potentially used as a raw material source for alumina production. There are several ways to get alumina. The fly ash could be acid leached or sintered with a suitable additive. One of the possible sintering processes is lime-soda sinter process. The article deals with products of lime-soda sinter process of the fly ash produced from brown coal in Czech thermal power plant. The phase composition of sintered material was determined by X-ray diffraction analysis (XRD). The presence of sodium aluminate and dicalcium silicate was confirmed.