Fluidized bed calcination of magnesite and its chemical and morphological changes
文献类型：会议论文
| 作者 | Han, Zhennan1; Sun, Cong1; Hao, Wenqian1; Liu, Xuejing1; Yue, Junrong2; Xu, Guangwen1,2 |
| 出版日期 | 1905-07-13 |
| 会议日期 | May 10, 2021 - May 14, 2021 |
| 关键词 | Reaction kinetics - Magnesite - Sintering - Fluidized beds - Grain size and shape - Magnesia - Activation energy - Crystal structure - Particle size analysis - Particle size |
| 页码 | 450-454 |
| 英文摘要 | In this study, the reaction kinetic of magnesite calcination in air atmospheres was measured in micro fluidized bed reaction analyzer (MFBRA) and TGA. The complete decomposition time of magnesite in TGA is above 4 min at heating rate of 40 oC /min, but it is just a few seconds (3-5 s) in MFBRA above 750 oC. The activation energy measured in MFBRA and TGA are 125 kJ/mol and 236 kJ/mol respectively, showing a good suitability of MFBRA for rapid reaction in fluidized bed at a specific temperature. Besides, a pilot-scale plant with a capacity of 1 kg/h was established to analysis the effect of temperature, particle size and calcination times on the characteristic of magnesite calcination in transport bed. For powder magnesite with particle sizes of 0.05-0.15 mm, it just needs 1.5-2.3 s to complete the calcination reaction as temperature is above 800 oC. However, with the calcination times exceeding 4 times or residence time exceeding 3 seconds, the recrystallization or sintering will lead to a large grain size of MgO crystal and a dense particle structure with a smaller surface area and a low reactivity. 漏 2021 CFB 2021 - Proceedings of the 13th International Conference on Fluidized Bed Technology. All rights reserved. |
| 会议录 | CFB 2021 - Proceedings of the 13th International Conference on Fluidized Bed Technology
 ; 13th International Conference on Fluidized Bed Technology, CFB 2021
|
| 会议录出版者 | GLAB Reactor and Fluidization Technologies |
| 学科主题 | Calcination |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59626]  |
| 作者单位 | 1.Institute of Industrial Chemistry and Energy Technology, Shenyang University of Chemical Technology, Liaoning, Shenyang; 110142, China 2.State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China |
| 推荐引用方式 GB/T 7714 | Han, Zhennan,Sun, Cong,Hao, Wenqian,et al. Fluidized bed calcination of magnesite and its chemical and morphological changes[C]. 见:. May 10, 2021 - May 14, 2021. |
入库方式： OAI收割
来源：过程工程研究所
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