CAS OpenIR
Mechanisms of mechanochemical activation during comprehensive utilization of high-alumina coal fly ash
Yang, Chennian; Zhang, Jianbo1; Li, Shaopeng; Li, Huiquan1; Hou, Xinjuan; Zhu, Ganyu
2020-10-01
Source PublicationWASTE MANAGEMENT
ISSN0956-053X
Volume116Pages:190-195
AbstractHigh-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.
KeywordHigh-alumina coal fly ash Desilication Mechanochemical activation Aluminum-silicon mass ratio Mechanism
DOI10.1016/j.wasman.2020.08.003
Language英语
WOS KeywordSI-29 ; EXTRACTION ; RECOVERY ; AL2O3 ; AL-27 ; FOCUS
Funding ProjectNational 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 Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
Funding OrganizationNational Key Research and Development Program of China ; National Nature Science Foundation of China ; State Key Laboratory of Solid Waste Reuse for Building Materials
WOS IDWOS:000571231800020
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/42184
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Jianbo; Li, Huiquan
Affiliation1.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
Recommended Citation
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.
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