Effect of cross-section shape of rotating chute on particle movement and distribution at the throat of a bell-less top blast furnace

Effects of Operational Parameters on Particle Movement and Distribution at the Top of a Bell‐Less Blast Furnace Based on Discrete Element Method

“…They are defined as the domain containing 80 wt% of particles at the end of the chute. [ 20 ] As shown in Figure 2b, with increasing chute length, the width of the burden stream first increases and then decreases, and its height increases. On the one hand, the burden is subjected to Coriolis and centrifugal forces for a longer time as it moves further on longer chutes.…”

“…To analyze the movement and distribution of particles above the burden surface of the blast furnace, the width, thickness, and main striking point (MSP) were considered, which have been defined in previous work. [ 20 ] The width, thickness, and MSP of the burden stream reflect the degree of burden concentration. In addition, the velocity of the burden was also considered, and the velocities of particles before they meet the burden surface were measured and used for the following analyses.…”

“…To evaluate the radial burden size segregation in the throat of a blast furnace, segregation index (SI) was introduced, which is defined in previous work. [20,45,46] It can be expressed as follows.…”

“…It was found that size segregation always exists in burden flows. Kou et al [ 20 ] studied the effects of three types of chutes on particle motion and radial burden distributions using a 3D DEM model. They found that a semicircular chute helps obtain a uniform radial size distribution.…”

“…Kou et al simulated burden distributions at different chute speeds and angles for three chute types. [ 20 ] However, the influences of chute length and stock‐line level are seldom considered in DEM studies of burden distributions. Therefore, the present article established a 3D model with a rotating chute in a bell‐less top blast furnace.…”