Relationship between the Phases, Structure, MgO Migration and the Reduction Performance of the Pre-oxidized Vanadium-titanium Magnetite Ore in a Fluidized Bed

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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, Zhan 1,2; Zhang, Meiju 1; Sun, Haoyan 1
刊名	ISIJ INTERNATIONAL
	2017
卷号	57 期号:3 页码:413-419
关键词	pre-oxidization vanadium-titanium magnetite fluidized bed reduction structural evolution MgO migration
ISSN号	0915-1559
英文摘要	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.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Metallurgy & Metallurgical Engineering
研究领域[WOS]	Metallurgy & Metallurgical Engineering
关键词[WOS]	SOLID-STATE REDUCTION ; TITANOMAGNETITE CONCENTRATE ; CARBON-MONOXIDE ; FERROUS ORE ; MECHANISM ; COAL ; BEHAVIOR
收录类别	SCI
语种	英语
WOS记录号	WOS:000397376300003
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/22005]
专题	过程工程研究所_多相复杂系统国家重点实验室
作者单位	1.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
推荐引用方式 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.