Mineral migration of alkali metal during the combustion of coal and sewage sludge

3rd International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Ling, Peng^1 ; Liu, Liang^1 ; Ai, Jinjin^1 ; Yin, Yanshan^1 ; Tian, Hong^1 ; Xie, Fei^1

School of Power and Energy Engineering, Changsha University of Science and Technology, Wanjiali South RD, 960, Changsha, Hunan

410114, China^1

关键词: Combustion of coal;    FactSage;    Migration process;    Mutual transformations;    Phase analysis;    Sanidines;    X ray fluorescence;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/61/1/012011/pdf
DOI  :  10.1088/1755-1315/61/1/012011

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The mineral migration of alkali metal during the combustion of coal and sewage sludge was studied by X-ray fluorescence (XRF), X-ray diffraction (XRD) phase analysis and Factsage 7.0 simulation. It showed that the migration process of potassium(K) during the combustion of coal-sludge blends mainly manifested the process from muscovite (KAl3Si3O10(OH)2) to sanidine (KAlSi3O8), which included the transforming process of escaped atom K combined with Na2SO4from glaserite or aphthitalite to sanidine (KAlSi3O8).The mutual transformation of ardite (Na2SO4) and albite (NaAlSi3O8) was mainly in the migration process of element Na with low-albite and high-albite appeared occurring in the process. The mutual transformation of anhydrite (CaSO4) and anorthite (CaAl2Si2O8) was mainly in the migration of element Ca.