Relation between Sticking and Metallic Iron Precipitation on the Surface of Fe2O3 Particles Reduced by CO in the Fluidized Bed

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	Relation between Sticking and Metallic Iron Precipitation on the Surface of Fe2O3 Particles Reduced by CO in the Fluidized Bed
	Zhang, Ben 1,2; Gong, Xuzhong 2; Wang, Zhi 2; Guo, Zhancheng 1,2
刊名	ISIJ INTERNATIONAL
	2011
卷号	51 期号:9 页码:1403-1409
关键词	sticking fluidized bed reduction degree metallization ratio iron ore
ISSN号	0915-1559
其他题名	ISIJ Int.
中文摘要	The Fe2O3 particles (150-224 mu m diameter) were reduced in a laboratory fluidized bed with CO-N-2 mixture gas at 700-900 degrees C to investigate the relation between sticking and iron precipitation. As a result, the sticking tended to occur with acceleration of the reduction rate, judging from the fluidization time. The sticking depended strongly on the metallization ratio signifying the probability of iron-iron contact that estimated the contact area of precipitated iron when particles collide together, whereas the reduction degree had indirect influence on it. Many tiny iron grains with the diameter of approximately 20-40 nm were found on the surface of particles by SEM and EDS. According to theory of microcrystal melting point, the grains reached Tammann temperature easily, leading to higher surface energy of iron, producing higher adhesion force among the reduced particles.
英文摘要	The Fe2O3 particles (150-224 mu m diameter) were reduced in a laboratory fluidized bed with CO-N-2 mixture gas at 700-900 degrees C to investigate the relation between sticking and iron precipitation. As a result, the sticking tended to occur with acceleration of the reduction rate, judging from the fluidization time. The sticking depended strongly on the metallization ratio signifying the probability of iron-iron contact that estimated the contact area of precipitated iron when particles collide together, whereas the reduction degree had indirect influence on it. Many tiny iron grains with the diameter of approximately 20-40 nm were found on the surface of particles by SEM and EDS. According to theory of microcrystal melting point, the grains reached Tammann temperature easily, leading to higher surface energy of iron, producing higher adhesion force among the reduced particles.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Metallurgy & Metallurgical Engineering
研究领域[WOS]	Metallurgy & Metallurgical Engineering
关键词[WOS]	SULFUR PRESSURE ; REDUCTION ; ORES ; HYDROGEN
收录类别	SCI
原文出处	://WOS:000295391700006
语种	英语
WOS记录号	WOS:000295391700006
公开日期	2013-11-28
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/6470]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Ben,Gong, Xuzhong,Wang, Zhi,et al. Relation between Sticking and Metallic Iron Precipitation on the Surface of Fe2O3 Particles Reduced by CO in the Fluidized Bed[J]. ISIJ INTERNATIONAL,2011,51(9):1403-1409.
APA	Zhang, Ben,Gong, Xuzhong,Wang, Zhi,&Guo, Zhancheng.(2011).Relation between Sticking and Metallic Iron Precipitation on the Surface of Fe2O3 Particles Reduced by CO in the Fluidized Bed.ISIJ INTERNATIONAL,51(9),1403-1409.
MLA	Zhang, Ben,et al."Relation between Sticking and Metallic Iron Precipitation on the Surface of Fe2O3 Particles Reduced by CO in the Fluidized Bed".ISIJ INTERNATIONAL 51.9(2011):1403-1409.