Optimization of carbon deposition process during the pre-reduction of fine iron ore in a fluidized bed

CORC > 过程工程研究所 > 中国科学院过程工程研究所 > 多相复杂系统国家重点实验室

	Optimization of carbon deposition process during the pre-reduction of fine iron ore in a fluidized bed
	Lei, Chao 1,2; Zhang, Gengyu 1,2; Zhu, Qingshan 1; Xie, Zhaohui 1
刊名	POWDER TECHNOLOGY
	2016-08-01
卷号	296 期号:AUG 页码:79-86
关键词	Fluidized bed Defluidization prevention Iron ore Carbon deposition Process optimization
ISSN号	0032-5910
英文摘要	Coating carbon on the iron ore powder is a quite promising way to prevent defluidization during its high temperature direct reduction in the fluidized bed reactor, but usually causes excessive carbon content of the DRI production, thus the present study focuses on decreasing the critical carbon content (C-critical value) needed for defluidization prevention by the optimization of the pre-reduction process. It was for the first time found that increasing the metallization ratio of the pre-reduced iron ore significantly could reduce the C-critical value, since it inhibited the carbon consumption and formation of metallic iron during the early stage of high temperature reduction. Based on this result, optimization principle to reduce the C-critical value was further proposed, i.e. increasing the pre-reduction rate (Rpre-reduction) and reducing the carbon deposition rate (R-carbon (deposition)) during the pre-reduction, such as by increasing the temperature and the H-2 mole fraction in CO-H-2 mixture gas. And such principle was verified by the experiment results, where for the iron ore pre-reduced in CO-H-2 mixture gas with the X-H2 >= 0.9 at 600 degrees C, its corresponding C-critical value was less than 3.5 wt.%, much lower than that of other conditions or the reported value in the literature. (C) 2015 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	STICKING ; PREVENTION ; BEHAVIOR ; POWDER ; FE2O3 ; CO
收录类别	SCI
语种	英语
WOS记录号	WOS:000377739800010
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/21151]
专题	过程工程研究所_多相复杂系统国家重点实验室
作者单位	1.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
推荐引用方式 GB/T 7714	Lei, Chao,Zhang, Gengyu,Zhu, Qingshan,et al. Optimization of carbon deposition process during the pre-reduction of fine iron ore in a fluidized bed[J]. POWDER TECHNOLOGY,2016,296(AUG):79-86.
APA	Lei, Chao,Zhang, Gengyu,Zhu, Qingshan,&Xie, Zhaohui.(2016).Optimization of carbon deposition process during the pre-reduction of fine iron ore in a fluidized bed.POWDER TECHNOLOGY,296(AUG),79-86.
MLA	Lei, Chao,et al."Optimization of carbon deposition process during the pre-reduction of fine iron ore in a fluidized bed".POWDER TECHNOLOGY 296.AUG(2016):79-86.