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Optimization of carbon deposition process during the pre-reduction of fine iron ore in a fluidized bed
Lei, Chao1,2; Zhang, Gengyu1,2; Zhu, Qingshan1; Xie, Zhaohui1
2016-08-01
发表期刊POWDER TECHNOLOGY
ISSN0032-5910
卷号296期号:AUG页码:79-86
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.
关键词Fluidized Bed Defluidization Prevention Iron Ore Carbon Deposition Process Optimization
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.powtec.2015.12.024
收录类别SCI
语种英语
关键词[WOS]STICKING ; PREVENTION ; BEHAVIOR ; POWDER ; FE2O3 ; CO
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Outstanding Youth Science Fund Project(21325628)
WOS记录号WOS:000377739800010
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21151
专题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
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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.
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