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题名: Influence of Content and Microstructure of Deposited Carbon on Fluidization Behavior of Iron Powder at Elevated Temperatures
作者: Lei, Chao1, 2;  Zhang, Tao3;  Zhang, Jianbo1, 2;  Fan, Chuanlin1;  Zhu, Qingshan1;  Li, Hongzhong1
关键词: fluidized bed ;  defluidization prevention ;  iron powder ;  carbon deposition ;  cohesion force
刊名: ISIJ INTERNATIONAL
发表日期: 2014
DOI: 10.2355/isijinternational.54.589
卷: 54, 期:3, 页:589-595
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Metallurgy & Metallurgical Engineering
研究领域[WOS]: Metallurgy & Metallurgical Engineering
英文摘要: Carbon was deposited on the surface of an iron powder to study the influence of carbon content and microstructure on defluidization prevention at 823-1 173 K. It was found that at each temperature there existed a minimal carbon content (C-min), below which defluidization occurred and C-min increases with increasing operation temperature. Microstructure of the deposited carbon, tailored by adjusting deposition conditions, showed significant influence on defluidization. Less carbon would be needed to prevent defluidization under a lower rate of carbon deposition since a more uniformly coating of carbon can be obtainable under such conditions. When the fluidizing gas is nitrogen, defluidization will eventually occur after extended time of fluidization even if the initial carbon content is greater than C-min, due to attrition that causes the decrease of carbon content with increasing time of fluidization. However, when the fluidizing gas is 70% CO-30% H-2, defluidization will not occur if the initial carbon content is greater than C-min since the carbon content will increase with increasing time of fluidization due to the further deposition of carbon under the CO-H-2 atmosphere. Furthermore, a fluidizing phase diagram was established for the carbon-coated iron powder and the mechanism of defluidization prevention was explained using a cohesive force based model.
关键词[WOS]: FE2O3 PARTICLES ;  BED REDUCTION ;  STICKING ;  DEFLUIDIZATION ;  PREVENTION ;  MECHANISM ;  ORES ;  GAS ;  CO
语种: 英语
WOS记录号: WOS:000333509300018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145440
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.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
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

Recommended Citation:
Lei, Chao,Zhang, Tao,Zhang, Jianbo,et al. Influence of Content and Microstructure of Deposited Carbon on Fluidization Behavior of Iron Powder at Elevated Temperatures[J]. ISIJ INTERNATIONAL,2014,54(3):589-595.
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