CAS OpenIR  > 多相复杂系统国家重点实验室
Enhanced effect and mechanism of Fe2O3 on CaO for defluidization inhibition during fluidized bed reduction of iron ore fines
Du, Zhan1,2; Zhu, Qingshan1; Fan, Chuanlin1; Pan, Feng1; Xie, Zhaohui1
2017-05-15
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume313Pages:82-87
Abstract

Brazilian iron ore fines were reduced in a laboratory fluidized bed with different Ca-based additives at 800 degrees C using 0.5 L/min H-2-0.5 L/min N-2. The fluidization results show that pure CaO and Ca(NO3)(2)center dot 4H(2)O only slightly prolong the fluidization time, with defluidization occurring eventually. However, mixtures of Ca(NO3)(2)center dot 4H(2)O and Fe(NO3)(3)center dot 9H(2)O could effectively inhibit defluidization. Reduction results of CaO/Fe2O3 suggest that Ca-based additives mainly inhibit defluidization through the physical spacer effect Microstructure observations indicate that 2CaO center dot Fe2O3 could suppress the growth of sharp-pointed whisker, and the introduction of Fe2O3 allows the Ca species to adhere tightly to the surface of the sticky iron, thereby decreasing its adhesiveness. Moreover, Fe2O3 is demonstrated to be a general binder capable of enhancing the ability of ineffective additives to prevent defluidization. (C) 2017 Elsevier B.V. All rights reserved.

KeywordDefluidization Enhancement Fluidized Bed Reduction Fe2o3 Cao
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.powtec.2017.03.010
Indexed BySCI
Language英语
WOS KeywordCoating Mgo ; Sticking ; Oxide ; Particles ; Co
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationChina National Funds for Distinguished Young Scientists(21325628) ; National Basic Research Program of China(2013C6632603) ; National Natural Science Foundation of China(51504232)
WOS IDWOS:000399508100010
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22479
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Du, Zhan,Zhu, Qingshan,Fan, Chuanlin,et al. Enhanced effect and mechanism of Fe2O3 on CaO for defluidization inhibition during fluidized bed reduction of iron ore fines[J]. POWDER TECHNOLOGY,2017,313:82-87.
APA Du, Zhan,Zhu, Qingshan,Fan, Chuanlin,Pan, Feng,&Xie, Zhaohui.(2017).Enhanced effect and mechanism of Fe2O3 on CaO for defluidization inhibition during fluidized bed reduction of iron ore fines.POWDER TECHNOLOGY,313,82-87.
MLA Du, Zhan,et al."Enhanced effect and mechanism of Fe2O3 on CaO for defluidization inhibition during fluidized bed reduction of iron ore fines".POWDER TECHNOLOGY 313(2017):82-87.
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