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Optimization of carbon deposition process during the pre-reduction of fine iron ore in a fluidized bed
Lei, Chao1,2; Zhang, Gengyu1,2; Zhu, Qingshan1; Xie, Zhaohui1
2016-08-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume296Issue:AUGPages:79-86
AbstractCoating carbon on the iron ore powder is a quite promising way to prevent defluidization during its high temperature direct reduction in the fluidized bed reactor, but usually causes excessive carbon content of the DRI production, thus the present study focuses on decreasing the critical carbon content (C-critical value) needed for defluidization prevention by the optimization of the pre-reduction process. It was for the first time found that increasing the metallization ratio of the pre-reduced iron ore significantly could reduce the C-critical value, since it inhibited the carbon consumption and formation of metallic iron during the early stage of high temperature reduction. Based on this result, optimization principle to reduce the C-critical value was further proposed, i.e. increasing the pre-reduction rate (Rpre-reduction) and reducing the carbon deposition rate (R-carbon (deposition)) during the pre-reduction, such as by increasing the temperature and the H-2 mole fraction in CO-H-2 mixture gas. And such principle was verified by the experiment results, where for the iron ore pre-reduced in CO-H-2 mixture gas with the X-H2 >= 0.9 at 600 degrees C, its corresponding C-critical value was less than 3.5 wt.%, much lower than that of other conditions or the reported value in the literature. (C) 2015 Elsevier B.V. All rights reserved.
KeywordFluidized Bed Defluidization Prevention Iron Ore Carbon Deposition Process Optimization
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.powtec.2015.12.024
Indexed BySCI
Language英语
WOS KeywordSTICKING ; PREVENTION ; BEHAVIOR ; POWDER ; FE2O3 ; CO
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Outstanding Youth Science Fund Project(21325628)
WOS IDWOS:000377739800010
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21151
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
Lei, Chao,Zhang, Gengyu,Zhu, Qingshan,et al. Optimization of carbon deposition process during the pre-reduction of fine iron ore in a fluidized bed[J]. POWDER TECHNOLOGY,2016,296(AUG):79-86.
APA Lei, Chao,Zhang, Gengyu,Zhu, Qingshan,&Xie, Zhaohui.(2016).Optimization of carbon deposition process during the pre-reduction of fine iron ore in a fluidized bed.POWDER TECHNOLOGY,296(AUG),79-86.
MLA Lei, Chao,et al."Optimization of carbon deposition process during the pre-reduction of fine iron ore in a fluidized bed".POWDER TECHNOLOGY 296.AUG(2016):79-86.
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