Research on the velocity distribution law of the coke in the chute of blast furnace based on discrete element method

The velocity distribution law of coke particles in the rotating chute of a blast furnace is the key factor determining the three-dimensional shape of the burden surface, and it is of great significance to improve the charging operation of blast furnace and realize energy saving and emission reduction. To analyze the velocity distribution law of coke in the chute, a 1:8 bell-less blast furnace based on the discrete element method is first established. Then, a coordinate transformation method is proposed to obtain the position and velocity information of the coke relative to the rotating chute. Finally, the movement trend and velocity distribution law of coke in the chute are analyzed. Results indicate that the velocity distribution of coke has apparent stratification. When the chute is stationary, the velocity is greater, while the coke is near the chute symmetry or farther from the chute edge. When the chute is rotating, the Z-axis velocity of the coke with a large radial movement distance is smaller than that of the coke with a small radial movement distance, but the radial velocity of the coke with a large radial movement distance is greater than that of the coke with a large radial movement distance.

Automated summary

The velocity distribution of coke particles in the rotating chute of a blast furnace plays a crucial role in determining the three-dimensional shape of the burden surface. By using the discrete element method and coordinate transformation, it was found that the velocity distribution of coke in the chute exhibits significant stratification. When the chute is stationary, coke particles near the center or far from the chute edge have higher velocities. When the chute is rotating, coke particles with larger radial movement distances have smaller Z-axis velocities but higher radial velocities.