Knowledge Management System Of Institute of process engineering,CAS
| Agglomeration/defluidization in a fluidized bed reduction of Fe2O3 particles by CO: Influences of iron precipitation on particle cohesiveness | |
| Alternative Title | Powder Technol. |
| Zhong, Yiwei1,2; Wang, Zhi1; Guo, Zhancheng3; Tang, Qing1 | |
| 2014-04-01 | |
| Source Publication | POWDER TECHNOLOGY
 |
| ISSN | 0032-5910 |
| Volume | 256Issue:1Pages:13-19 |
| Abstract | Influences of iron precipitation on particle cohesiveness related to agglomeration and defluidization in Fe2O3 reduction were investigated in a visual fluidized bed reactor. A new method of the controlled defluidization tests was employed to examine the evolution of bed agglomeration. The real-time agglomeration tendency was represented by the defluidization temperature. Results showed that defluidization potential increased by increasing metallization degree. According to thermo-mechanical analysis, the precipitation of metallic iron significantly reduced the sintering temperature and surface viscosity of Fe2O3 particles, resulting in the evolution of the bed materials from cohesiveless to sticky. The SEM analysis showed that fine iron nuclei with nano/micro size on the surface acted as necks to form agglomerates by sintering and enhanced particle cohesiveness. Thus, the metallized bed particles tended to adhere and resulted in bed defluidization. The calculated adhesive force between particles depended on both metallic iron content and surface viscosity, which was in good agreement with the experiment results for defluidization. (C) 2014 Elsevier B.V. All rights reserved.; Influences of iron precipitation on particle cohesiveness related to agglomeration and defluidization in Fe2O3 reduction were investigated in a visual fluidized bed reactor. A new method of the controlled defluidization tests was employed to examine the evolution of bed agglomeration. The real-time agglomeration tendency was represented by the defluidization temperature. Results showed that defluidization potential increased by increasing metallization degree. According to thermo-mechanical analysis, the precipitation of metallic iron significantly reduced the sintering temperature and surface viscosity of Fe2O3 particles, resulting in the evolution of the bed materials from cohesiveless to sticky. The SEM analysis showed that fine iron nuclei with nano/micro size on the surface acted as necks to form agglomerates by sintering and enhanced particle cohesiveness. Thus, the metallized bed particles tended to adhere and resulted in bed defluidization. The calculated adhesive force between particles depended on both metallic iron content and surface viscosity, which was in good agreement with the experiment results for defluidization. (C) 2014 Elsevier B.V. All rights reserved. |
| Keyword | Fluidized-bed Reduction Fe2o3 Agglomeration Defluidization Iron Precipitation Particle Cohesiveness |
| Subtype | Article |
| WOS Headings | Science & Technology ; Technology |
| DOI | 10.1016/j.powtec.2014.01.086 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | GAS FLUIDIZATION ; HIGH-TEMPERATURE ; AGGLOMERATION ; DEFLUIDIZATION ; STICKING ; VELOCITY ; MECHANISMS ; DIFFUSION ; BEHAVIOR |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Chemical |
| WOS ID | WOS:000335097600003 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Version | 出版稿 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/11058 |
| Collection | 研究所（批量导入） |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China 3.Univ Sci & Technol Beijing, Key Lab Ecol & Recycle Met, Beijing 100083, Peoples R China |
| Recommended Citation GB/T 7714 | Zhong, Yiwei,Wang, Zhi,Guo, Zhancheng,et al. Agglomeration/defluidization in a fluidized bed reduction of Fe2O3 particles by CO: Influences of iron precipitation on particle cohesiveness[J]. POWDER TECHNOLOGY,2014,256(1):13-19. |
| APA | Zhong, Yiwei,Wang, Zhi,Guo, Zhancheng,&Tang, Qing.(2014).Agglomeration/defluidization in a fluidized bed reduction of Fe2O3 particles by CO: Influences of iron precipitation on particle cohesiveness.POWDER TECHNOLOGY,256(1),13-19. |
| MLA | Zhong, Yiwei,et al."Agglomeration/defluidization in a fluidized bed reduction of Fe2O3 particles by CO: Influences of iron precipitation on particle cohesiveness".POWDER TECHNOLOGY 256.1(2014):13-19. |
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| File Name/Size | DocType | Version | Access | License | ||
| Agglomeration_deflui（1219KB） | 限制开放 | CC BY-NC-SA | Application Full Text | |||
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