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
发表期刊CERAMICS INTERNATIONAL
ISSN0272-8842
卷号44期号:4页码:3884-3892
摘要High-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.
关键词Hafa Al-si Series Ceramics Synergistic Activation Amorphous Silicate Reactivity Desilication Al/si Mass Ratio
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.ceramint.2017.11.178
收录类别SCI
语种英语
关键词[WOS]ALKALINE ACTIVATION ; POWER-PLANT ; GLASS ; COMPOSITE
WOS研究方向Materials Science
WOS类目Materials Science, Ceramics
项目资助者Science 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记录号WOS:000424716200049
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24039
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.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
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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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