Oxidation Kinetics of Magnetite During the Cooling Process of Magnetization Roasting

doi:10.12068/j.issn.1005-3026.2018.12.017

Abstract

Abstract: The cooling process of magnetization roasting has been investigated. The variation of magnetite oxidation reaction fraction and rate was observed， and the oxidation kinetics was analyzed using model matching method. The results indicated that oxidation temperature had a significant effect on the reaction fraction and rate. At the same oxidation time， the reaction fraction and rate increased as temperature increasing. The curves of reaction fraction and rate under different temperatures presented the similar variation with increasing reaction time. The mechanism function of isothermal oxidation of magnetite was determined to be Avrami-Erofee equation with n=4. The apparent activation energy and pre-exponential factor were 135.2kJ·mol and 6.19×10¹⁰min^-1， respectively.

Key words: magnetization roasting, isothermal oxidation, reaction fraction, reaction rate, kinetics

CLC Number:

TD951

SUN Yong-sheng， CAO Yue， HAN Yue-xin， LI Yan-jun. Oxidation Kinetics of Magnetite During the Cooling Process of Magnetization Roasting[J]. Journal of Northeastern University Natural Science, 2018, 39(12): 1759-1763.

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