DEM study of the effect of different chute conditions on burden distribution during charging process blast furnace

Abstract

Chute accidents frequently occur during blast furnace operation. Worn or even fractured chutes can seriously affect the movement of the charge, subsequently impacting the burden distribution in the blast furnace. Therefore, it is necessary to investigate the influence of different types of chutes on burden distribution. In this paper, a model of a serial-hopper bell-less top system was established and the burden distribution through different chutes was calculated using EDM. The results of the calculations are as follows: wear liner reduces the average velocity of the charge at the chute outlet and the charge platform moves closer to the center of the blast furnace; the greater the fractured length, the greater the average velocity at the chute outlet and the easier it is for particles to accumulate in the center of the blast furnace; the velocity of the charge in the perforated chute is smaller than that the intact chute, and the hole size has limited effect on the velocity of the set position. Particle size and volume of blast furnace edge are reduced.