Per: Emerson Edilson BARROS DE SOUZA (UNIVERSIDADE FEDERAL DO CEARA), Francisco Marcondes (UNIVERSIDADE FEDERAL DO CEARA), Jose Adilson De Castro (UNIVERSIDADE FEDERAL FLUMINENSE)
Abstract:
The present study used the Computational Fluid Dynamics using the commercial software ANSYS-FLUENT, to simulate the formation and combustion in the raceway cavity of blast furnace to coke. The study adapted a combustion model from the literature to simulate the reaction rates of coke and pulverized injectable coal. To simulate the formation of the raceway cavity, a multiphase approach was used, considering coke as a granular material. The combustion models (coke and coal) and the raceway formation were simulated separately for their validation, where, with the analysis of the results, a good agreement with those of the literature was achieved. Then, the three models were used in a simplified geometry of the coke bed taken from the literature, using blast furnace operational from the same study. The results of the blast furnace simulation showed that the partial combustion rate was the highest among the reactions, and that it was possible to identify differences in burnout due to reaction kinetics, where the oxygen consumed by coke combustion interfered in the burning of particles with diameter greater than 30 um.