Effects of particle size and coating on decomposition of alumina-extracted residue from high-alumina fly ash
Wang, Zehua1,2; Ma, Shuhua1; Tang, Zhenhua1; Wang, Xiaohui1; Zheng, Shili1
2016-05-05
发表期刊JOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
卷号308期号:MAY页码:253-263
摘要The effective removal of alkali in the alumina-extracted reside (AER) obtained by extracting alumina from high-alumina fly ash is the premise for realizing the utilization of the silicon component in the fly ash. Sodium was removed from the AER by a decomposition reaction. The effects of the particle size and reactant coating on the decomposition reaction of AER were studied, and the results showed that by decreasing the particle size, the decomposition reaction rate of AER could be enhanced obviously and the Na2O content of the products could be decreased effectively. In addition, the process and mechanism of the decomposition reaction of AER and the reaction kinetics were investigated. The results revealed that the decomposition reaction of AER started from the outer surface of the AER particles. The reaction kinetics corresponded with shrinking unreacted core models. Furthermore, the decomposition reaction rate of AER could be enhanced obviously by decreasing the particle size because the effect of product layer diffusion was weakened when the particle size of AER was decreased. (C) 2016 Elsevier B.V. All rights reserved.
关键词Fly Ash Alumina-extracted Residue Nacahsio4 Particle Size Coating
文章类型Article
WOS标题词Science & Technology ; Technology ; Life Sciences & Biomedicine
DOI10.1016/j.jhazmat.2016.01.043
收录类别SCI
语种英语
关键词[WOS]COAL ; NACAHSIO4 ; RECOVERY
WOS研究方向Engineering ; Environmental Sciences & Ecology
WOS类目Engineering, Environmental ; Engineering, Civil ; Environmental Sciences
项目资助者National Key Basic Research Program(2013CB632601) ; National Key Technology RD Program(2012BAF03B01) ; Hangzhou Jinjiang Group(KFA2013-124)
WOS记录号WOS:000374803600031
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21023
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, Natl Engn Lab Hydromet Cleaner Prod, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Wang, Zehua,Ma, Shuhua,Tang, Zhenhua,et al. Effects of particle size and coating on decomposition of alumina-extracted residue from high-alumina fly ash[J]. JOURNAL OF HAZARDOUS MATERIALS,2016,308(MAY):253-263.
APA Wang, Zehua,Ma, Shuhua,Tang, Zhenhua,Wang, Xiaohui,&Zheng, Shili.(2016).Effects of particle size and coating on decomposition of alumina-extracted residue from high-alumina fly ash.JOURNAL OF HAZARDOUS MATERIALS,308(MAY),253-263.
MLA Wang, Zehua,et al."Effects of particle size and coating on decomposition of alumina-extracted residue from high-alumina fly ash".JOURNAL OF HAZARDOUS MATERIALS 308.MAY(2016):253-263.
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