Kinetic Study on Microwave Magnetizing Roast of Fe2O3 Powders
| Autor: | Lei Wang, Jie Li, Pei Min Guo, Ling Bing Kong |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Kinetics 0211 other engineering and technologies 02 engineering and technology Activation energy 021001 nanoscience & nanotechnology Condensed Matter Physics Kinetic energy Atomic and Molecular Physics and Optics Chemical engineering Microwave heating General Materials Science 0210 nano-technology Microwave 021102 mining & metallurgy |
| Zdroj: | Solid State Phenomena. 304:91-97 |
| ISSN: | 1662-9779 |
| DOI: | 10.4028/www.scientific.net/ssp.304.91 |
| Popis: | In this paper, the reaction kinetic mechanism of Fe2O3 powder containing carbon was studied by microwave magnetizing roast. Based on the temperature-rise curve and weight loss curve of Fe2O3 powder by microwave magnetizing roast, the kinetic parameters of Fe2O3 powder microwave magnetizing roast were calculated by non-isothermal methods. The controlling steps of different temperature-rising periods in microwave magnetizing roast process of Fe2O3 powder were calculated by the Achar-Brindley-Sharp-Wendworth method. The results indicated that the controlling step of microwave magnetizing roast was phase boundary reaction control of contracted cylinder in 250~450°C, and it was three-dimensional diffusion control of spherical symmetry in 450~650°C. The results showed that the starting temperature of reduction roasting of Fe2O3 powder was 250°C, which was lower than that under electrical heating, thereby, it proved in theory that microwave heating can enhance reaction rate. |
| Databáze: | OpenAIRE |
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