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Direct reduction of fine iron ore concentrate in a conical fluidized bed
He, Shengyi1,2; Sun, Haoyan1; Hu, Chaoquan1; Li, Jun1; Zhu, Qingshan1,2; Li, Hongzhong1
2017-05-15
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume313Pages:161-168
Abstract

The direct utilization of fine iron ore concentrate in fluidized beds is of significance but has the problem of defluidization during operation. In this study, we have made a comparison of a conical fluidized bed and a cylindrical fluidized bed for the direct reduction process. The results showed that the conical fluidized bed was more versatile than the cylindrical fluidized bed in treating the fine iron ore concentrate. In the conical fluidized bed, with a high superficial gas velocity, defluidization was successfully inhibited without adding inert materials or causing elutriation issues. Simultaneously, the reduction efficiency was considerably improved and the obtained iron agglomerates exhibited a high metallization degree. This work also proposes a fluidization regime diagram for the conical fluidized bed at the temperature range from 650 to 800 degrees C According to the fluidization regime diagram, the conical fluidized bed is able to considerably expand the operational temperature range for the direct reduction process. These results demonstrate that the conical fluidized bed is a clean, efficient alternative means for intensifying the direct reduction process. (C) 2017 Elsevier B.V. All rights reserved.

KeywordConical Fluidized Bed Cylindrical Fluidized Bed Direct Reduction Defluidization Agglomeration High Temperature
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.powtec.2017.03.007
Indexed BySCI
Language英语
WOS KeywordHydrodynamic Characteristics ; Reactor ; Gas ; Temperature ; Pyrolysis ; Sticking ; Powders ; Carbon ; Fe2o3 ; Prevention
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Outstanding Youth Science Fund Project of NSFC(21325628) ; NSFC(51404228)
WOS IDWOS:000399508100018
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22475
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
He, Shengyi,Sun, Haoyan,Hu, Chaoquan,et al. Direct reduction of fine iron ore concentrate in a conical fluidized bed[J]. POWDER TECHNOLOGY,2017,313:161-168.
APA He, Shengyi,Sun, Haoyan,Hu, Chaoquan,Li, Jun,Zhu, Qingshan,&Li, Hongzhong.(2017).Direct reduction of fine iron ore concentrate in a conical fluidized bed.POWDER TECHNOLOGY,313,161-168.
MLA He, Shengyi,et al."Direct reduction of fine iron ore concentrate in a conical fluidized bed".POWDER TECHNOLOGY 313(2017):161-168.
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