A new kinetic model for MgO-C reaction has been constructed and validated by using the experimental results reported in the literature. Differently from the models suggested by previous researchers, this new model can quantitatively evaluate and reveal the effects of various parameters such as temperature, total pressure, carbon content in refractory brick and particle size on the MgO-C reaction. Interestingly, most of the reported kinetic data, though obtained under different conditions by different researchers, fit well with the same Arrhenius plot determined by the new model. The temperature dependency of apparent activation energy and pressure dependency of apparent activation volume corresponding to the two sub-reactions of the MgO-C reaction, are also determined. And mass transfer coefficient of gas phase is also determined. Furthermore, the rate-controlling step is considered based on the predictions of the new model. In addition, the effects of carbon content and average particle diameter on the MgO-C reaction are simulated by using the model and discussed.

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