Theoretical calculation and validation of burden trajectory in bell-less top blast furnace

Abstract

The trajectory of materials is an important parameter in determining the impact point where the falling materials intersect with the stockline profile in blast furnace charging control. In order to clarify the trajectory of materials and validate the theoretical calculated trajectory, a 1 : 15 scale cold model of an actual 2500 m 3 shaft and bell-less top charging system has been built. The results indicate that the experimental trajectory is consistent with the theoretical one.

Effect of the Main Feeding Belt Position on Burden Distribution during the Charging Process of Bell-less Top Blast Furnace with Two Parallel Hoppers

“…Additionally, some investigators studied the size distribution and falling point of particles by small scale experiments. [9][10][11][12][13][14][15][16][17] However, the information obtained from experiments or single particle mathematical model on size segregation and flow patterns is still limited. Therefore, more detailed work is needed in order to understand the burden distribution in the hopper and throat.…”

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

“…[1][2][3] Burden particles are charged on a rotating chute and then distributed in the furnace. [4] In general, there are three main methods used for studying the burden distribution in a blast furnace, namely, scale model experimentation, [5,6] numerical simulation, [7] and actual blast furnace experimentation. [8] However, scale model and actual blast furnace experiments are expensive and time-consuming.…”

“…Teng et al [ 11,12 ] established a 3D mathematical model of particle motion and analyzed the influences of section shape, length, rotating speed, and chute tilting distance on a particle's 3D movement. Yu et al [ 5,6 ] established a 1:15 cold‐scaled experimental model based on an actual 2500 m 3 blast furnace. A digital camera was used to record the trajectory of the burden, which was compared with theoretical modeling.…”

Numerical Investigation of Burden Distribution in a Blast Furnace

“…In the past decades, substantial experiments and numerical studies have been conducted, focusing on various aspects of burden distribution, including falling trajectory of burden materials from the charging device onto the burden surface, development of the burden profile at the throat, coke collapse towards the center of the furnace under the influence of ore charging onto the coke layer, size segregation, descent of burden layers, and shaft thermal conditions relevant to heat transfer behavior and gas distribution . In particular, the discrete element method (DEM) is a typical approach which can capture motions of individual particles, hence particle flow behavior.…”