1. Key Laboratory of National Education Ministry for Electromagnetic Process of Materials, Northeastern University, Shenyang 110004, Liaoning, China 2. Research Institute, Northeastern University, Shenyang 110004, Liaoning, China
Kinetics of Oxidation Reaction for Magnetite Pellets
1. Key Laboratory of National Education Ministry for Electromagnetic Process of Materials, Northeastern University, Shenyang 110004, Liaoning, China 2. Research Institute, Northeastern University, Shenyang 110004, Liaoning, China
ժҪ An experiment for the oxidation process of single magnetite pellet and theoretical analysis based on modified unreacted core shrinking (MUCS) model were carried out, and the controlling mechanisms of the initial and developing reactions were examined, respectively. From the study of the initial reaction, it was found that the chemical reaction of surface is the controlling step of the overall reaction when the temperature is up to about 750 K, while the mass transfer through the gaseous boundary layer dominates the reaction rate when the temperature is above 750 K. As the reaction developing within the pellet, the mass transfer through the produced layer becomes the controlling step. In addition, the effects of reaction conditions (such as oxygen concentration, temperature) on the fractional oxidation of magnetite pellet were determined.
Abstract��An experiment for the oxidation process of single magnetite pellet and theoretical analysis based on modified unreacted core shrinking (MUCS) model were carried out, and the controlling mechanisms of the initial and developing reactions were examined, respectively. From the study of the initial reaction, it was found that the chemical reaction of surface is the controlling step of the overall reaction when the temperature is up to about 750 K, while the mass transfer through the gaseous boundary layer dominates the reaction rate when the temperature is above 750 K. As the reaction developing within the pellet, the mass transfer through the produced layer becomes the controlling step. In addition, the effects of reaction conditions (such as oxygen concentration, temperature) on the fractional oxidation of magnetite pellet were determined.
LIANG Ru-quan,YANG Shuo,YAN Fu-sheng,HE Ji-cheng. Kinetics of Oxidation Reaction for Magnetite Pellets[J]. �й������ڿ���, 2013, 20(9): 16-20.
LIANG Ru-quan,YANG Shuo,YAN Fu-sheng,HE Ji-cheng. Kinetics of Oxidation Reaction for Magnetite Pellets. Chinese Journal of Iron and Steel, 2013, 20(9): 16-20.
2013, Vol. 20 
