CAS OpenIR  > 多相复杂系统国家重点实验室
The Role of MgO Powder in Preventing Defluidization during Fluidized Bed Reduction of Fine Iron Ores with Different Iron Valences
Du, Zhan1,2; Zhu, Qingshan1; Yang, Yafeng1; Fan, Chuanlin1; Pan, Feng1; Sun, Haoyan1; Xie, Zhaohui1
2016-12-01
Source PublicationSTEEL RESEARCH INTERNATIONAL
ISSN1611-3683
Volume87Issue:12Pages:1742-1749
Abstract

The role of MgO powder in preventing defluidization during the fluidized bed reduction of fine iron ores with different iron valences is investigated. The inhibiting effect of MgO powder on different types of fine iron ores is the same at 973 K, whereas it is sequenced as FeO> Fe3O4> Fe2O3 at 1073 and 1173 K. Specific diffusion couples are employed to clarify the valence-dependent inhibiting mechanism. Electron probe microanalysis, X-ray diffraction results, and the estimation of diffusion activation energy indicate that the inhibiting effect of MgO powder on defluidization is mainly caused by the physical barrier effect for all iron oxides below 1073 K, while the defluidization prevention of Fe3O4 and FeO at 1173 K is mainly attributed to the formation of Fe2MgO4 and MgO . FeO compounds on the surface, respectively. As a result, the required MgO content to prevent defluidization is sequenced as m(Fe2O3)> m(Fe3O4)> m(FeO) at 1173 K. Consequently, the MgO addition at the FeO stage will be more effective in preventing defluidization than the addition at Fe2O3 and Fe3O4 stages during multi- stage fluidized bed reduction of fine iron ores.

KeywordFluidized Bed Reduction Diffusion Couples Inhibiting Effect Mgo Powder Iron Oxides With Different Iron Valences
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1002/srin.201600122
Indexed BySCI
Language英语
WOS KeywordSYSTEM ; INTERDIFFUSION ; TEMPERATURES ; BEHAVIOR
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationNational Outstanding Youth Science Fund Project of NSFC(21325628) ; National Natural Science Foundation of China(51404228)
WOS IDWOS:000392632900019
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21886
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Du, Zhan,Zhu, Qingshan,Yang, Yafeng,et al. The Role of MgO Powder in Preventing Defluidization during Fluidized Bed Reduction of Fine Iron Ores with Different Iron Valences[J]. STEEL RESEARCH INTERNATIONAL,2016,87(12):1742-1749.
APA Du, Zhan.,Zhu, Qingshan.,Yang, Yafeng.,Fan, Chuanlin.,Pan, Feng.,...&Xie, Zhaohui.(2016).The Role of MgO Powder in Preventing Defluidization during Fluidized Bed Reduction of Fine Iron Ores with Different Iron Valences.STEEL RESEARCH INTERNATIONAL,87(12),1742-1749.
MLA Du, Zhan,et al."The Role of MgO Powder in Preventing Defluidization during Fluidized Bed Reduction of Fine Iron Ores with Different Iron Valences".STEEL RESEARCH INTERNATIONAL 87.12(2016):1742-1749.
Files in This Item:
File Name/Size DocType Version Access License
The Role of MgO Powd(958KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Du, Zhan]'s Articles
[Zhu, Qingshan]'s Articles
[Yang, Yafeng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Du, Zhan]'s Articles
[Zhu, Qingshan]'s Articles
[Yang, Yafeng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Du, Zhan]'s Articles
[Zhu, Qingshan]'s Articles
[Yang, Yafeng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.