A novel force balance model for predicting defluidization of ilmenite in a fluidized bed reactor
文献类型：期刊论文
| 作者 | Zhang, Xu1,2; Li, Jun2; Zou, Zheng2; Zhang, Huigang2; Yan, Dong2; Du, Zhan2; Xie, Zhaohui2; Zhu, Qingshan1,2 |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2023-02-15 |
| 卷号 | 454页码:10 |
| 关键词 | Reduction Ilmenite Defluidization Surface coverage Sphericity |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2022.140112 |
| 英文摘要 | Ilmenite particles are readily defluidized when they are reduced in a fluidized bed reactor because nano-micro iron nuclei that precipitate on the particle surface are adhesive and tend to aggregate. We propose herein a novel force balance model with which to predict defluidization phenomena. This model is based on the particle cohesion force comprising the sum of the cohesion forces for surface asperities. As the surface coverage of iron particles increases with the extent of reduction, the cohesion forces of the particles gradually increase and eventually trigger defluidization. The surface coverage predicted by the model agrees well with experimental results for 88.4 - 154.7 mu m particles and the temperature range 700 - 850 degrees C. The new force balance model reveals that particle size, sphericity, and temperature play key roles in defluidization of ilmenite during reduction. Defluidization occurs readily for fine and irregular particles, especially at high temperatures. Our model combines asperity, surface coverage, and particle sphericity to make a more general prediction. |
| WOS关键词 | IRON PARTICLES ; GAS ; AGGLOMERATION ; REDUCTION ; MECHANISM ; NANOPARTICLES ; BEHAVIORS ; POWDERS |
| 资助项目 | National Natural Science Foundation of China ; Fund of State Key Laboratory of Multiphase complex systems ; [21736010] ; [21978300] ; [MPCS-2019-A-06] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000913199000004 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Natural Science Foundation of China ; Fund of State Key Laboratory of Multiphase complex systems |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/56758]  |
| 通讯作者 | Li, Jun; Zhu, Qingshan |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xu,Li, Jun,Zou, Zheng,et al. A novel force balance model for predicting defluidization of ilmenite in a fluidized bed reactor[J]. CHEMICAL ENGINEERING JOURNAL,2023,454:10. |
| APA | Zhang, Xu.,Li, Jun.,Zou, Zheng.,Zhang, Huigang.,Yan, Dong.,...&Zhu, Qingshan.(2023).A novel force balance model for predicting defluidization of ilmenite in a fluidized bed reactor.CHEMICAL ENGINEERING JOURNAL,454,10. |
| MLA | Zhang, Xu,et al."A novel force balance model for predicting defluidization of ilmenite in a fluidized bed reactor".CHEMICAL ENGINEERING JOURNAL 454(2023):10. |
入库方式： OAI收割
来源：过程工程研究所
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