Kinetic Study on Microwave Magnetizing Roast of Fe₂O₃ Powders

Abstract:

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.

• Periodical: Solid State Phenomena (Volume 304)
• Pages: 91-97
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.304.91
• Online since: May 2020
• Authors: Lei Wang*, Ling Bing Kong, Pei Min Guo, Jie Li
• Keywords: Activation Energy, Fe₂O₃, Kinetics, Magnetizing Roast, Microwave Heating

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