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Mechanism of mechanical-chemical synergistic activation for preparation of mullite ceramics from high-alumina coal fly ash
Zhang, Jianbo1; Li, Huiquan1; Li, Shaopeng1; Hu, Pengpeng1; Wu, Wenfen1; Wu, Qisheng2; Xi, Xinguo2
2018-03-01
Source PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Volume44Issue:4Pages:3884-3892
AbstractHigh-alumina coal fly ash (HAFA) is a special solid waste due to the existence of more than 45% alumina and 35% silica, which can be applied to prepare Al-Si series ceramics if the impurities can be removed and the Al/Si mass ratio can exceed 2.55 (Mullite: 3Al(2)O(3).2SiO(2)). In this work, a new mechanical chemical synergistic activation desilication process is proposed, and the contents of different impurities can be lowered up to less than 1%, and the Al/Si mass ratio can be elevated from 1.26 to 2.71. Especially, the mechanism of this process is investigated in detail. The analysis of the mechanism shows that the decrease of Q(4)(3Al) and the increase of Q(4)(0Al), Q(4)(1Al), and Q(4)(2Al) improve amorphous silicate reactivity through synergistic activation, and the exposed amorphous Si-O-/Si-O-Si can be removed by OH-during the desilication process (desilicated ratio > 55%), which help the fine mullite to exhibit excellent properties (bulk density > 2.85 g/cm(3), apparent porosity < 0.5%) during the sintering process. Finally, this process not only decreases the pollution but also alleviates the shortage of Al/Si resources and promotes the clean development of coal-fired power generation.
KeywordHafa Al-si Series Ceramics Synergistic Activation Amorphous Silicate Reactivity Desilication Al/si Mass Ratio
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ceramint.2017.11.178
Indexed BySCI
Language英语
WOS KeywordALKALINE ACTIVATION ; POWER-PLANT ; GLASS ; COMPOSITE
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
Funding OrganizationScience and Technology Planning Project of Inner Mongolia Autonomous Region(201501059) ; Shanxi Province Coal Based Low-carbon Technology Major Projects(MC2016-05) ; Jiangsu Collaborative Innovation Center for Ecological Building Materials and Environmental Protection Equipments / Yancheng Institute of Technology / Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province(YCXT201612)
WOS IDWOS:000424716200049
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24039
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100090, Peoples R China
2.Yancheng Inst Technol, Yancheng 224051, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Jianbo,Li, Huiquan,Li, Shaopeng,et al. Mechanism of mechanical-chemical synergistic activation for preparation of mullite ceramics from high-alumina coal fly ash[J]. CERAMICS INTERNATIONAL,2018,44(4):3884-3892.
APA Zhang, Jianbo.,Li, Huiquan.,Li, Shaopeng.,Hu, Pengpeng.,Wu, Wenfen.,...&Xi, Xinguo.(2018).Mechanism of mechanical-chemical synergistic activation for preparation of mullite ceramics from high-alumina coal fly ash.CERAMICS INTERNATIONAL,44(4),3884-3892.
MLA Zhang, Jianbo,et al."Mechanism of mechanical-chemical synergistic activation for preparation of mullite ceramics from high-alumina coal fly ash".CERAMICS INTERNATIONAL 44.4(2018):3884-3892.
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