Numerical Simulation and Experimental Study on BF Raceway

Considering effects air turbulent and other chemical reactions in blast furnace (BF) raceway, the raceway turbulent mathematical model was built. CFX software has been applied to complete the numerical simulation of the mathematical model and to analyze the physical and chemistry states in a visualization way. The maximum concentration of CO is about 27.4% under the condition of 1000 coke particles. The distribution rule of the gas flow is that the gas flow is poor in the center of BF and the gas flow is high in the BF fringe. To simulate the coke action, a cold experiment has been carried out. According to the theory of similarity and modeling, a raceway cold model was also established. Three-dimensional (3D) laser Phase Doppler Analyzer (PDA) was utilized to measure the turbulent flow in the raceway cold model. The instantaneous, time-averaged and root mean square (RMS) of fluctuating velocities of the gas and the grain were obtained. The distribution rules of the grain velocities were analyzed. Two eddy flows had been verified in the BF raceway by the numerical simulation and the experiment. The results of the numerical resolution are basically in accord with the BF experiment results. This study provided the guidance for BF operation.