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Relationship between the Phases, Structure, MgO Migration and the Reduction Performance of the Pre-oxidized Vanadium-titanium Magnetite Ore in a Fluidized Bed
Pan, Feng1; Du, Zhan1,2; Zhang, Meiju1; Sun, Haoyan1
2017
Source PublicationISIJ INTERNATIONAL
ISSN0915-1559
Volume57Issue:3Pages:413-419
Abstract

This paper contrastively investigated the reduction behavior of raw and oxidized vanadium titanium magnetite ore (RVTM and OVTM) in a bubbling fluidized bed at 800 degrees C under 75%N2-25%H2, and systematically revealed the relationship between the structure, phases change, MgO migration behavior and the reduction performance. Microstructure observations suggest that oxidization conditions greatly affect structural evolution, phase transformation of Fe Ti oxides, and migration of MgO in OVTM. The reduction results indicated that the average metallization degree enhanced by 8-10% as the OVTM ore had high oxidization degree. When the RVTM ore was treated at 800 degrees C, the reduction rate increased with the increase of oxidization degree, no significant difference was observed among these oxidized samples due to their similar internal and surface structure. However, the reduction rate of OVTM at 950 degrees C depended on the oxidization time. The reduction rate of OVTM oxidized at 950 degrees C for 2 h was faster than the one for 1 h, which was attributed to the better exsolution of MgO and the formation of bigger pores, even though both samples were fully oxidized and Fe2TiO5 formed in the oxidization process.

KeywordPre-oxidization Vanadium-titanium Magnetite Fluidized Bed Reduction Structural Evolution Mgo Migration
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.2355/isijinternational.ISIJINT-2016-499
Indexed BySCI
Language英语
WOS KeywordSolid-state Reduction ; Titanomagnetite Concentrate ; Carbon-monoxide ; Ferrous Ore ; Mechanism ; Coal ; Behavior
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationState Key Development Program for Basic Research of China (973 Program)(2013CB632603) ; National Natural Science Foundation of China(21325628 ; 51404228)
WOS IDWOS:000397376300003
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22005
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 100039, Peoples R China
Recommended Citation
GB/T 7714
Pan, Feng,Du, Zhan,Zhang, Meiju,et al. Relationship between the Phases, Structure, MgO Migration and the Reduction Performance of the Pre-oxidized Vanadium-titanium Magnetite Ore in a Fluidized Bed[J]. ISIJ INTERNATIONAL,2017,57(3):413-419.
APA Pan, Feng,Du, Zhan,Zhang, Meiju,&Sun, Haoyan.(2017).Relationship between the Phases, Structure, MgO Migration and the Reduction Performance of the Pre-oxidized Vanadium-titanium Magnetite Ore in a Fluidized Bed.ISIJ INTERNATIONAL,57(3),413-419.
MLA Pan, Feng,et al."Relationship between the Phases, Structure, MgO Migration and the Reduction Performance of the Pre-oxidized Vanadium-titanium Magnetite Ore in a Fluidized Bed".ISIJ INTERNATIONAL 57.3(2017):413-419.
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