OPTIMIZATION OF ROTATING CHUTE SHAPE IN BLAST FURNACE BASE ON DEM

摘要

The chute shape determines the particle trajectory on and leaving the chute, and further affects the burden distribution in blast furnace. Therefore, a three dimensional model of the upper part of serial type bell-less top blast furnace is established based on discrete element method. The effects of chute shape on the burden distribution in blast furnace is investigated. The results show the main striking point is the largest for arc shape chute, followed by rectangular and arc to rectangular shape chutes, and the smallest for tapered rectangular shape chute. Arc shape chute is beneficial to obtain uniform radial size distribution at 20 ° and 30 ° chute angle, while it is trapezoidal shape chute at 40 ° shape chute. Tapered rectangular shape chute helps to form aggregated burden stream, which is beneficial for practical operation to perform precise burden control.