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250813s2025 xx |||||o 00| ||eng c |
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|a 10.1016/j.wasman.2025.115067
|2 doi
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|a pubmed25n1570.xml
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|a (DE-627)NLM391065122
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|a (NLM)40795517
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|a (PII)S0956-053X(25)00478-7
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
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|a Yang, Chennian
|e verfasserin
|4 aut
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|a Exploring the synergistic activation mechanism of mechanochemical processing in the enhancement of high-alumina coal fly ash utilization
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|c 2025
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 15.09.2025
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|a Date Revised 15.09.2025
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2025 Elsevier Ltd. All rights reserved.
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|a In this study, the synergistic activation mechanism of mechanochemical treatment on high alumina fly ash (HAFA) is discussed, which is a unique form of solid waste with an internal alumina content exceeding 40 %. The mineral phases of mullite and corundum in HAFA make it a promising raw material for the production of refractory materials. However, its application is limited due to the low alumina-silica ratio and high impurity content. Through a combination of experimental techniques and density functional theory (DFT) simulation calculations, we investigate the mechanochemical activation process. Mechanochemical treatment significantly increases the specific surface area of HAFA from 2.76 m2/g to 14.99 m2/g, accompanied by a reduction in particle size and the preferential exposure of amorphous silica. This treatment also transforms the Al-O-Si coordination structure from Q4(3Al) to a more reactive Q4(2Al) structure, with the proportion of reactive Q4(2Al) increasing from 4.46 % to 35.32 %. Therefore, mechanochemical activation can effectively improve the reaction activity of amorphous aluminosilicate. Post-desilication, the HAFA primarily consists of mullite and corundum, with the high-alumina coal fly ash aluminum-to-silicon ratio enhanced from 1.01 to 2.41. The mechanochemical method combines physical grinding with chemical reaction, which can not only change the physical and chemical properties of HAFA, but also shorten the process of desilication reaction, reduce material consumption and provide new method support for the resource utilization of HAFA
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|a Journal Article
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|a Activation process
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|a Alumina-silica ratio
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|a Desilication
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|a High-alumina coal fly ash
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|a Mechanism
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|a Mechanochemical
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|a Coal Ash
|2 NLM
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| 650 |
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|a Aluminum Oxide
|2 NLM
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| 650 |
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|a LMI26O6933
|2 NLM
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| 650 |
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|a Silicon Dioxide
|2 NLM
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| 650 |
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|a 7631-86-9
|2 NLM
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| 650 |
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|a Solid Waste
|2 NLM
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| 700 |
1 |
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|a Zhang, Jianbo
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Chenye
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hou, Xinjuan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Shaopeng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Congcong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Huiquan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Waste management (New York, N.Y.)
|d 1999
|g 206(2025) vom: 16. Sept., Seite 115067
|w (DE-627)NLM098197061
|x 1879-2456
|7 nnas
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| 773 |
1 |
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|g volume:206
|g year:2025
|g day:16
|g month:09
|g pages:115067
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| 856 |
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|u http://dx.doi.org/10.1016/j.wasman.2025.115067
|3 Volltext
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