CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
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
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume308Issue:MAYPages:253-263
AbstractThe 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.
KeywordFly Ash Alumina-extracted Residue Nacahsio4 Particle Size Coating
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
DOI10.1016/j.jhazmat.2016.01.043
Indexed BySCI
Language英语
WOS KeywordCOAL ; NACAHSIO4 ; RECOVERY
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Engineering, Civil ; Environmental Sciences
Funding OrganizationNational Key Basic Research Program(2013CB632601) ; National Key Technology RD Program(2012BAF03B01) ; Hangzhou Jinjiang Group(KFA2013-124)
WOS IDWOS:000374803600031
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21023
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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