CAS OpenIR  > 研究所(批量导入)
Agglomeration/defluidization in a fluidized bed reduction of Fe2O3 particles by CO: Influences of iron precipitation on particle cohesiveness
Alternative TitlePowder Technol.
Zhong, Yiwei1,2; Wang, Zhi1; Guo, Zhancheng3; Tang, Qing1
2014-04-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume256Issue:1Pages:13-19
AbstractInfluences of iron precipitation on particle cohesiveness related to agglomeration and defluidization in Fe2O3 reduction were investigated in a visual fluidized bed reactor. A new method of the controlled defluidization tests was employed to examine the evolution of bed agglomeration. The real-time agglomeration tendency was represented by the defluidization temperature. Results showed that defluidization potential increased by increasing metallization degree. According to thermo-mechanical analysis, the precipitation of metallic iron significantly reduced the sintering temperature and surface viscosity of Fe2O3 particles, resulting in the evolution of the bed materials from cohesiveless to sticky. The SEM analysis showed that fine iron nuclei with nano/micro size on the surface acted as necks to form agglomerates by sintering and enhanced particle cohesiveness. Thus, the metallized bed particles tended to adhere and resulted in bed defluidization. The calculated adhesive force between particles depended on both metallic iron content and surface viscosity, which was in good agreement with the experiment results for defluidization. (C) 2014 Elsevier B.V. All rights reserved.; Influences of iron precipitation on particle cohesiveness related to agglomeration and defluidization in Fe2O3 reduction were investigated in a visual fluidized bed reactor. A new method of the controlled defluidization tests was employed to examine the evolution of bed agglomeration. The real-time agglomeration tendency was represented by the defluidization temperature. Results showed that defluidization potential increased by increasing metallization degree. According to thermo-mechanical analysis, the precipitation of metallic iron significantly reduced the sintering temperature and surface viscosity of Fe2O3 particles, resulting in the evolution of the bed materials from cohesiveless to sticky. The SEM analysis showed that fine iron nuclei with nano/micro size on the surface acted as necks to form agglomerates by sintering and enhanced particle cohesiveness. Thus, the metallized bed particles tended to adhere and resulted in bed defluidization. The calculated adhesive force between particles depended on both metallic iron content and surface viscosity, which was in good agreement with the experiment results for defluidization. (C) 2014 Elsevier B.V. All rights reserved.
KeywordFluidized-bed Reduction Fe2o3 Agglomeration Defluidization Iron Precipitation Particle Cohesiveness
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.powtec.2014.01.086
URL查看原文
Indexed BySCI
Language英语
WOS KeywordGAS FLUIDIZATION ; HIGH-TEMPERATURE ; AGGLOMERATION ; DEFLUIDIZATION ; STICKING ; VELOCITY ; MECHANISMS ; DIFFUSION ; BEHAVIOR
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000335097600003
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11058
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
3.Univ Sci & Technol Beijing, Key Lab Ecol & Recycle Met, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Zhong, Yiwei,Wang, Zhi,Guo, Zhancheng,et al. Agglomeration/defluidization in a fluidized bed reduction of Fe2O3 particles by CO: Influences of iron precipitation on particle cohesiveness[J]. POWDER TECHNOLOGY,2014,256(1):13-19.
APA Zhong, Yiwei,Wang, Zhi,Guo, Zhancheng,&Tang, Qing.(2014).Agglomeration/defluidization in a fluidized bed reduction of Fe2O3 particles by CO: Influences of iron precipitation on particle cohesiveness.POWDER TECHNOLOGY,256(1),13-19.
MLA Zhong, Yiwei,et al."Agglomeration/defluidization in a fluidized bed reduction of Fe2O3 particles by CO: Influences of iron precipitation on particle cohesiveness".POWDER TECHNOLOGY 256.1(2014):13-19.
Files in This Item:
File Name/Size DocType Version Access License
Agglomeration_deflui(1219KB) 限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhong, Yiwei]'s Articles
[Wang, Zhi]'s Articles
[Guo, Zhancheng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhong, Yiwei]'s Articles
[Wang, Zhi]'s Articles
[Guo, Zhancheng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhong, Yiwei]'s Articles
[Wang, Zhi]'s Articles
[Guo, Zhancheng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.