Petrological and mineralogical characterizations and chemical composition of coal ashes from power plants in Yanzhou mining district, China
Liu, GJ; Zhang, HY; Gao, LF; Zheng, LG; Peng, ZC
2004-10-15
Source PublicationFUEL PROCESSING TECHNOLOGY
Volume85Issue:15Pages:1635-1646
SubtypeArticle
AbstractThe Yanzhou mine district, located southwest of Shandong province, is about 1300 km(2), With the more than 8 x 10(9) tons of proven reserve sources of coal and 10 big power plants. Up to now, a great amount of coal ashes and waste rocks is stockpiled in the area, and has influenced the environment of the mine area. In this paper, the authors obtained raw coal and ash samples from three power plants; analyzed the enrichment and concentration of trace elements Pb, Zn, Th, Cu, As, V, Cl, and F in coal ashes; and studied petrological and mineralogical characterizations and the chemical composition of coal ashes. The aim of this work is to provide scientific basis for comprehensive utilization and reduction of environmental pollution in the future. On the basis of the study of petrologic, chemical, and trace elements in coal ashes, it was concluded that the ash yield of coals is the residue derived from inorganic and organic matter during incineration and combustion of coal, and the major composition of coal ashes is as follows: crystalline, glassy, and organic matter (incompletely combusted carbon). The main constituents of ashes are SiO2 and Al2O3, with low contents of Fe2O3 and CaO, and little amounts of SO3, P2O5, Na2O, K2O, and TiO2. The higher concentration of the compounds is in fly ash, whereas the lower one is in bottom ash. The mass fractions of Pb, Cu, Zn, As, V, and Th were higher in ashes than that in raw coal. The mass fraction of these elements in fly ash is higher than that in bottom ash. Therefore, the smaller the ash particle size is, the higher is the mass fraction of the trace elements Pb, Cu, Zn, As, V, and Th. However, the mass fraction of elements Cl and F is lower in ashes than that in raw coal, and the mass fraction of Cl and F in ashes is positive in the particle size of ashes. (C) 2004 Elsevier B.V. All rights reserved.
Keywordcoal ashes trace elements chemical composition power plants petrological and mineralogical characterizations Yanzhou mine area
Subject AreaChemistry ; Energy & Fuels ; Engineering
DOI10.1016/j.fuproc.2003.10.028
WOS KeywordTRACE-ELEMENTS ; FLY-ASH ; COMBUSTION ; BEHAVIOR ; EMISSIONS ; RAW
Indexed BySCI ; SCIE
Language英语
WOS Research AreaChemistry, Applied ; Energy & Fuels ; Engineering, Chemical
WOS IDWOS:000223436500003
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:68[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/11908
Collection黄土与第四纪地质国家重点实验室(1985-2004)
Recommended Citation
GB/T 7714
Liu, GJ,Zhang, HY,Gao, LF,et al. Petrological and mineralogical characterizations and chemical composition of coal ashes from power plants in Yanzhou mining district, China[J]. FUEL PROCESSING TECHNOLOGY,2004,85(15):1635-1646.
APA Liu, GJ,Zhang, HY,Gao, LF,Zheng, LG,&Peng, ZC.(2004).Petrological and mineralogical characterizations and chemical composition of coal ashes from power plants in Yanzhou mining district, China.FUEL PROCESSING TECHNOLOGY,85(15),1635-1646.
MLA Liu, GJ,et al."Petrological and mineralogical characterizations and chemical composition of coal ashes from power plants in Yanzhou mining district, China".FUEL PROCESSING TECHNOLOGY 85.15(2004):1635-1646.
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