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| 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 Publication | WASTE MANAGEMENT
 |
| ISSN | 0956-053X |
| Volume | 116Pages:190-195 |
| Abstract | 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. |
| Keyword | High-alumina coal fly ash Desilication Mechanochemical activation Aluminum-silicon mass ratio Mechanism |
| DOI | 10.1016/j.wasman.2020.08.003 |
| Language | 英语 |
| WOS Keyword | SI-29 ; EXTRACTION ; RECOVERY ; AL2O3 ; AL-27 ; FOCUS |
| Funding Project | 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 Research Area | Engineering ; Environmental Sciences & Ecology |
| WOS Subject | Engineering, Environmental ; Environmental Sciences |
| Funding Organization | National Key Research and Development Program of China ; National Nature Science Foundation of China ; State Key Laboratory of Solid Waste Reuse for Building Materials |
| WOS ID | WOS:000571231800020 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/42184 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Zhang, Jianbo; Li, Huiquan |
| Affiliation | 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 |
| 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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