Effects of chemistry and mineral on structural evolution and chemical   reactivity of coal gangue during calcination: towards efficient   utilization

doi:10.1617/s11527-014-0353-0

CORC > 北京大学 > 工学院

	Effects of chemistry and mineral on structural evolution and chemical reactivity of coal gangue during calcination: towards efficient utilization
	Zhang, Yingyi ; Xu, Ling ; Seetharaman, Sridhar ; Liu, Lili ; Wang, Xidong ; Zhang, Zuotai
刊名	MATERIALS AND STRUCTURES
	2015
关键词	Coal gangue Structural evolution Calcination Efficient utilization MULLITE REACTION SEQUENCE KAOLINITE COMBUSTION BEHAVIOR CHINA ACTIVATION SPECTRA CEMENT SHANXI WASTE
DOI	10.1617/s11527-014-0353-0
英文摘要	The utilization of coal gangue is usually subjected to calcination to achieve high chemical reactivity and exclude carbon. The correlation between the composition and properties of coal gangue during calcination is essential for its applications. In this paper, the effect of chemistry and minerals of coal gangues on the thermal behavior, structural evolution and chemical states of silicon and aluminum during the calcination process were systematically investigated. The results show that high alumina (Al-H) containing coal gangue consists primarily of kaolinite, while in medium and low alumina containing (Al-M and Al-L) groups, the major mineral phases are quartz, kaolinite, illite with minor impurities. The chemical reactivity of coal gangue mainly contributes to the transformation of kaolinite to metakaolinite, while illite plays a minor role and quartz is inert. The combustion of carbon may promote the dehydroxylation of clay minerals and further affects the structure evolution of coal gangue. The optimal calcination temperature to exclude carbon and achieve high chemical reactivity is therefore suggested as 700 A degrees C. Based on the findings the utilization of coal gangue is discussed in light of composition and structure.; Common Development Fund of Beijing; National Natural Science Foundation of China [51172003, 51074009]; National High Technology Research and Development Program of China (863 Program) [2012AA06A114]; China National Key Technology RD Program [2011BAB03B02, 2013BAC14B07]; SCI(E); EI; ARTICLE; zuotaizhang@pku.edu.cn; 9; 2779-2793; 48
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/416970]
专题	工学院
推荐引用方式 GB/T 7714	Zhang, Yingyi,Xu, Ling,Seetharaman, Sridhar,et al. Effects of chemistry and mineral on structural evolution and chemical reactivity of coal gangue during calcination: towards efficient utilization[J]. MATERIALS AND STRUCTURES,2015.
APA	Zhang, Yingyi,Xu, Ling,Seetharaman, Sridhar,Liu, Lili,Wang, Xidong,&Zhang, Zuotai.(2015).Effects of chemistry and mineral on structural evolution and chemical reactivity of coal gangue during calcination: towards efficient utilization.MATERIALS AND STRUCTURES.
MLA	Zhang, Yingyi,et al."Effects of chemistry and mineral on structural evolution and chemical reactivity of coal gangue during calcination: towards efficient utilization".MATERIALS AND STRUCTURES (2015).