Mechanisms of mechanochemical activation during comprehensive utilization of high-alumina coal fly ash

doi:10.1016/j.wasman.2020.08.003

	Mechanisms of mechanochemical activation during comprehensive utilization of high-alumina coal fly ash
	Yang, Chennian ; Zhang, Jianbo 1; Li, Shaopeng ; Li, Huiquan 1; Hou, Xinjuan ; Zhu, Ganyu
刊名	WASTE MANAGEMENT
	2020-10-01
卷号	116 页码:190-195
关键词	High-alumina coal fly ash Desilication Mechanochemical activation Aluminum-silicon mass ratio Mechanism
ISSN号	0956-053X
DOI	10.1016/j.wasman.2020.08.003
英文摘要	High-alumina coal fly ash (HAFA) is an important aluminum and silicon resource. In terms of its comprehensive utilization, how to efficiently separate aluminum and silicon must be resolved. In this work, a mechanochemical activation method in the desilication process is adopted and investigated. Desilication ratio, efficient desilicated ratio, microscopic appearance, and coordination structure change in aluminum-silicon atoms are investigated during mechanochemical activation process. Results indicate that the Al-O-Si coordination structure in HAFA can be transformed from Q(4) (3A1) and Q(4) (2A1) to reactive Q(2) (1A1) structure, and the radio of Q(2) (1A1) with high activity increased from 6.93% to 14.47%, which can improve HAFA reaction activity obviously. During the desilication process, the aluminum-silicon mass ratio (A/S) can be elevated from 1.23 to 2.56 after the process optimization, which provides a high-quality raw material for further high-valued utilization of HAFA. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Key Research and Development Program of China[2019YFC1904302] ; National Nature Science Foundation of China[51804293] ; National Nature Science Foundation of China[U1810205] ; National Nature Science Foundation of China[51704272] ; State Key Laboratory of Solid Waste Reuse for Building Materials[SWR-2019-005]
WOS关键词	SI-29 ; EXTRACTION ; RECOVERY ; AL2O3 ; AL-27 ; FOCUS
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000571231800020
资助机构	National Key Research and Development Program of China ; National Nature Science Foundation of China ; State Key Laboratory of Solid Waste Reuse for Building Materials
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/42183]
专题	中国科学院过程工程研究所
通讯作者	Zhang, Jianbo; Li, Huiquan
作者单位	1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100090, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yang, Chennian,Zhang, Jianbo,Li, Shaopeng,et al. Mechanisms of mechanochemical activation during comprehensive utilization of high-alumina coal fly ash[J]. WASTE MANAGEMENT,2020,116:190-195.
APA	Yang, Chennian,Zhang, Jianbo,Li, Shaopeng,Li, Huiquan,Hou, Xinjuan,&Zhu, Ganyu.(2020).Mechanisms of mechanochemical activation during comprehensive utilization of high-alumina coal fly ash.WASTE MANAGEMENT,116,190-195.
MLA	Yang, Chennian,et al."Mechanisms of mechanochemical activation during comprehensive utilization of high-alumina coal fly ash".WASTE MANAGEMENT 116(2020):190-195.