Relationship of particle size, reaction and sticking behavior of iron ore fines toward efficient fluidized bed reduction
文献类型：期刊论文
| 作者 | Du, Zhan1,2; Liu, Jiayi2; Liu, Fan1; Pan, Feng1,2 |
| 刊名 | Chemical Engineering Journal
 |
| 出版日期 | 2022-11-01 |
| 卷号 | 447 |
| 关键词 | Activation energy - Fluidization - Iron ore reduction - Iron ores - Particle size - Reaction kinetics |
| ISSN号 | 13858947 |
| DOI | 10.1016/j.cej.2022.137588 |
| 英文摘要 | The relationship of particle size, reaction and sticking behavior of iron ore fines toward efficient fluidized bed hydrogen reduction were systematically investigated at 600鈥?00 掳C in a laboratory fluidized bed. First, the reduction kinetics were studied, and the results showed that hydrogen reduction of granulated iron ore was controlled by reduction reaction, and the activation energy was approximately 88.4 kJ/mol. The reduction rate of granulated iron ore with a diameter of 200 渭m could be increased by 10 times as the reduction temperature rose from 600 to 800 掳C. Then, a modified force balance model was established to distinguish the critical sticking point of granulated iron ore during high temperature fluidized bed hydrogen reduction, and it indicated that the defluidization temperature could be raised from 630 to 790 掳C as the particle size was enlarged from 100 to 200 渭m with a fluidization number of 10. Eventually, coupling the kinetic model and modified force balance model, the maximum gas utilization rate of fluidized bed hydrogen reduction was estimated, and it indicated that at reduction temperatures of 650鈥?50 掳C with particle sizes of 200鈥?00 渭m, the optimal gas utilization rate could be achieved, which was consistent with the experimental results. Contradictory to traditional understandings of chemical reaction engineering, due to the interaction of reduction performance and sticking behavior, too high of a reduction temperature or too small of a particle size might not be preferable for fluidized bed hydrogen reduction, and this study provided valuable references for industrial operation. 漏 2022 Elsevier B.V. |
| 学科主题 | Fluidized Beds |
| 项目编号 | The authors wish to gratefully acknowledge the financial support from the National Natural Science Foundation of China (Nos. 21908227, 21878305, and 22078326). |
| 出版者 | Elsevier B.V. |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/61181]  |
| 作者单位 | 1.University of Chinese Academy of Sciences, Beijing; 100049, China 2.State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China |
| 推荐引用方式 GB/T 7714 | Du, Zhan,Liu, Jiayi,Liu, Fan,et al. Relationship of particle size, reaction and sticking behavior of iron ore fines toward efficient fluidized bed reduction[J]. Chemical Engineering Journal,2022,447. |
| APA | Du, Zhan,Liu, Jiayi,Liu, Fan,&Pan, Feng.(2022).Relationship of particle size, reaction and sticking behavior of iron ore fines toward efficient fluidized bed reduction.Chemical Engineering Journal,447. |
| MLA | Du, Zhan,et al."Relationship of particle size, reaction and sticking behavior of iron ore fines toward efficient fluidized bed reduction".Chemical Engineering Journal 447(2022). |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。