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Study on the correlation between Fe/Ti forms and reaction activity high-alumina coal fly ash
Yang, Chennian1,2; Zhang, Jianbo1; Hou, Xinjuan1,2; Li, Shaopeng1; Li, Huiquan1,2; Zhu, Ganyu1,2; Qi, Fang3
2021-10-20
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume792Pages:7
AbstractHigh-alumina coal fly ash (HAFA) is an important aluminum and silicon resource. In the process of preparing aluminum-silicon materials from HAFA, the influence of impurity elements on its performance must be considered. In this work, the occurrence state of impurities in HAFA, micro morphology, and the bond energy of different impurity coordination were studied. Sulfuric add leaching method and density functional theory were used to study the leaching behavior of impurities to verify the difficulty of removing different impurity elements. The results show that iron existed in the form of magnetic particles (34.78%), amorphous phase (49.24%), and crystalline phase (15.96%) in HAFA. Titanium mainly existed in amorphous phase (29.34%) and crystalline phase (69.4%). In sulfuric add leaching, titanium was more difficult to leach, and the content of TiO2 decreased from 2.30% to 225%, whereas that of Fe2O3 decreased from 1.50% to 0.86%. The actual leaching behavior of impurity elements was consistent with the simulation results, with more energy required to remove Ti than Fe. These studies of impurity elements in HAFA will provide theoretical support for the preparation of aluminum-silicon materials. (C) 2021 Elsevier B.V. An rights reserved.
KeywordHigh-alumina coal fly ash Iron Titanium Sulfuric acid leaching Density functional theory
DOI10.1016/j.scitotenv.2021.148419
Language英语
WOS KeywordINNER-MONGOLIA ; BOTTOM ASH ; EXTRACTION ; ACCURATE ; MULLITE ; PHASE ; GA ; AL
Funding ProjectNational Nature Science Foundation of China[51804293] ; National Nature Science Foundation of China[U1810205] ; National Nature Science Foundation of China[51704272]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationNational Nature Science Foundation of China
WOS IDWOS:000689569200006
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/50014
Collection中国科学院过程工程研究所
Corresponding AuthorLi, Shaopeng
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100090, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
3.Wuhan Univ Sci & Technol, Coll Resources & Environm Engn, State Environm Protect Key Lab Mineral Met Resour, Wuhan 430081, Hubei, Peoples R China
Recommended Citation
GB/T 7714
Yang, Chennian,Zhang, Jianbo,Hou, Xinjuan,et al. Study on the correlation between Fe/Ti forms and reaction activity high-alumina coal fly ash[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,792:7.
APA Yang, Chennian.,Zhang, Jianbo.,Hou, Xinjuan.,Li, Shaopeng.,Li, Huiquan.,...&Qi, Fang.(2021).Study on the correlation between Fe/Ti forms and reaction activity high-alumina coal fly ash.SCIENCE OF THE TOTAL ENVIRONMENT,792,7.
MLA Yang, Chennian,et al."Study on the correlation between Fe/Ti forms and reaction activity high-alumina coal fly ash".SCIENCE OF THE TOTAL ENVIRONMENT 792(2021):7.
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