Reduction of fine iron ore via a two-step fluidized bed direct reduction process
文献类型：期刊论文
| 作者 | Zhang, Tao1,2; Lei, Chao1,3; Zhu, Qingshan1 |
| 刊名 | POWDER TECHNOLOGY
 |
| 出版日期 | 2014-03-01 |
| 卷号 | 254期号:1页码:1-11 |
| 关键词 | Fluidized bed Direct reduction process Fine iron ore Defluidization Carbon precipitation |
| ISSN号 | 0032-5910 |
| 其他题名 | Powder Technol. |
| 中文摘要 | The industrial application of fluidized bed direct reduction (DR) process for fine iron ore is hampered by the sticking of direct reduction iron (DRI) particles. In the present study, the carbon precipitation reaction is coupled with the reduction reaction of fine iron ore to modify the cohesive force among DRI particles. The competition between the reduction reaction of fine iron ore and the carbon precipitation reaction leads to three types of fluidization behaviors: fluidization, unstable fluidization and defluidization. The carbon precipitation reaction is dominant at the temperature below 600-675 degrees C, and the presence of H-2 could retard the growth of iron whiskers and promote carbon precipitation. A new type of DRI particle covered with carbon shell is therefore constructed and named as DR!, particle. The growth of iron and carbon gasification can destroy the carbon shell, and lead to the increase of stickiness; however, the presence of CO can retard or prevent the destroying. The C/Fe mass ratio on the surface has significant influence on the stickiness and also the fluidization behavior of DRIc particles. The lower limit of C/Fe mass ratio, below which defluidization occurs, increases sharply with increasing temperature. Based on these findings, a two-step fluidized bed DR process for fine iron ore is proposed and proved feasible, and the operating lines of the fluidization zones are indicated as maps. (C) 2014 Elsevier B.V. All rights reserved. |
| 英文摘要 | The industrial application of fluidized bed direct reduction (DR) process for fine iron ore is hampered by the sticking of direct reduction iron (DRI) particles. In the present study, the carbon precipitation reaction is coupled with the reduction reaction of fine iron ore to modify the cohesive force among DRI particles. The competition between the reduction reaction of fine iron ore and the carbon precipitation reaction leads to three types of fluidization behaviors: fluidization, unstable fluidization and defluidization. The carbon precipitation reaction is dominant at the temperature below 600-675 degrees C, and the presence of H-2 could retard the growth of iron whiskers and promote carbon precipitation. A new type of DRI particle covered with carbon shell is therefore constructed and named as DR!, particle. The growth of iron and carbon gasification can destroy the carbon shell, and lead to the increase of stickiness; however, the presence of CO can retard or prevent the destroying. The C/Fe mass ratio on the surface has significant influence on the stickiness and also the fluidization behavior of DRIc particles. The lower limit of C/Fe mass ratio, below which defluidization occurs, increases sharply with increasing temperature. Based on these findings, a two-step fluidized bed DR process for fine iron ore is proposed and proved feasible, and the operating lines of the fluidization zones are indicated as maps. (C) 2014 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] | CARBON-MONOXIDE ; SMELTING-REDUCTION ; STICKING BEHAVIOR ; DECOMPOSITION ; PREVENTION ; OXIDE ; DEPOSITION ; MECHANISM ; HYDROGEN ; POWDERS |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000333883800001 |
| 公开日期 | 2014-08-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/11034]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Tao,Lei, Chao,Zhu, Qingshan. Reduction of fine iron ore via a two-step fluidized bed direct reduction process[J]. POWDER TECHNOLOGY,2014,254(1):1-11. |
| APA | Zhang, Tao,Lei, Chao,&Zhu, Qingshan.(2014).Reduction of fine iron ore via a two-step fluidized bed direct reduction process.POWDER TECHNOLOGY,254(1),1-11. |
| MLA | Zhang, Tao,et al."Reduction of fine iron ore via a two-step fluidized bed direct reduction process".POWDER TECHNOLOGY 254.1(2014):1-11. |
入库方式： OAI收割
来源：过程工程研究所
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