Particle flow and behavior at bell-less charging of the blast furnace

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Yaowei Yu, Henrik Saxén
Publisher: WILEY
Publication year: 2013
Journal: Steel Research International
Journal acronym: STEEL RES INT
Volume number: 84
Issue number: 10
Start page: 1018
End page: 1033
Number of pages: 16
ISSN: 1611-3683
eISSN: 1869-344X


Abstract

The burden distribution in the upper part of the blast furnace is one of the most important factors controlling the gas flow distribution, and therefore the efficiency of heat and mass transfer and chemical reactions between gas and solids in the process. This work studies burden profiles formed by pellets and coke dumps using experiments and simulation. Comparing results from DEM simulation with findings from a small-scale experimental system, it is demonstrated that the modeling technique is feasible. The rotation of the chute was found to cause a shift of the particles off from the bottom center line of the chute. In the burden layer formation, coke forms a pile at the intersection of falling trajectory and burden surface, while pellets spread towards the furnace center, simultaneously occupying the space between the larger coke particles after the pellet pile has reached the maximum natural angle. Particles with a high angular velocity were found to be more likely to enter the region close to the furnace wall. It is also shown that reducing the shear modulus of the burden material in the simulation is an efficient method to increase the calculating speed of the DEM without significant effect on the results of the simulation.


Keywords

bell-less charging, blast furnace, burden profile, discrete element model, rotating chute

Last updated on 2019-24-10 at 03:00