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Characterization of Precipitated Carbon by XPS and Its Prevention Mechanism of Sticking during Reduction of Fe2O3 Particles in the Fluidized Bed
Zhang, Ben1,2; Wang, Zhi2; Gong, Xuzhong2; Guo, Zhancheng1,2
2013
Source PublicationISIJ INTERNATIONAL
Volume53Issue:3Pages:411-418
AbstractThe Fe2O3 particles with the diameter between 74 and 150 mu m were pre-reduced with CO at 923 K to precipitate the carbon on the surface. Then the particles were reduced by CO at 1 173 K in the fluidized bed for examining the efficiency of the precipitated carbon for preventing the sticking. The result showed that the sticking of particles with high metallization ratio could be retarded or prevented by the precipitated carbon. For clarifying the prevention mechanism of the sticking, the carbon in different states was characterized by X-ray Photoelectron Spectroscopy (XPS) and its effects on sticking were discussed. The carbon on the surface was divided into two states, the graphitic carbon and the carbon in Fe3C. On account of the sticking of Fe3C at approximately 1 054 K and the sticking of the sponge iron at the micron scale, the structural change of the precipitated iron by the carburization and the formation of Fe3C only retard the sticking. Therefore, the prevention of the sticking at 1 173 K was attributed to the graphitic carbon. Due to the formation of metallic iron layer avoiding the consumption of the carbon and the formation of Fe3C restraining the dissolution of the graphitic carbon, the graphitic carbon accumulated on the surface of the particles, resulted in n(c)/n(Fe) above 1.0, so that Fe3C and the metallic iron was coated by the graphitic carbon to block their contact among the particles.
KeywordFluidized Bed Fe2o3 Particles Prevention Of Sticking Pre-reduction Graphitic Carbon Fe3c
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
Language英语
WOS KeywordFINE IRON-ORES ; SULFUR PRESSURE ; KINETICS
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000316776500005
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13414
Collection研究所(批量导入)
Affiliation1.Univ Sci & Technol, State Key Lab Adv Met, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Ben,Wang, Zhi,Gong, Xuzhong,et al. Characterization of Precipitated Carbon by XPS and Its Prevention Mechanism of Sticking during Reduction of Fe2O3 Particles in the Fluidized Bed[J]. ISIJ INTERNATIONAL,2013,53(3):411-418.
APA Zhang, Ben,Wang, Zhi,Gong, Xuzhong,&Guo, Zhancheng.(2013).Characterization of Precipitated Carbon by XPS and Its Prevention Mechanism of Sticking during Reduction of Fe2O3 Particles in the Fluidized Bed.ISIJ INTERNATIONAL,53(3),411-418.
MLA Zhang, Ben,et al."Characterization of Precipitated Carbon by XPS and Its Prevention Mechanism of Sticking during Reduction of Fe2O3 Particles in the Fluidized Bed".ISIJ INTERNATIONAL 53.3(2013):411-418.
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