Modified Unreacted Core Model for Reduction of Manganese Ore by CO Gas

Pre-reduction of manganese ore has a direct impact on energy savings for the subsequent smelting process. To this end, knowledge of the kinetics of the pre-reduction of manganese ore is useful in controlling the process parameters for the subsequent smelting process. In this study, a kinetic model that considers the effects of temperature, ore size, and CO content during the reduction process is developed. The model was performed using an unreacted core model using similarity to iron ore. This modified unreacted core model can be used to predict the change in the state of manganese ore over time, and this can predict the change in the reduction rate depending on the process temperature, CO gas change and ore size. The rate constants of the chemical reaction of manganese ore are obtained experimentally. The results of the developed prediction model show good agreement with the experimental data and the reduction degree of manganese ore is found to increase with increasing temperature and CO content in the gas. Graphic Abstract