Simulation on the Solid Flow in COREX Shaft Furnace with CGD Using DEM

In order to obtain the resonable gas distribution, a Center Gas Distribution (CGD) technology was introduced into a new set of COREX-3000 in Baosteel. However, CGD can affect the solid flow in the shaft furnace. In this paper, DEM was used to investigate the basic solid flow pattern, the influence of discharging rates and non-uniform discharging rates on the burden movement and the influence of CGD on the solid flow pattern. The influence of CGD on the velocity and distribution of solid flow was also studied. The results confirm that there are three types of flow zones in furnace. The discharging rate has almost no effect on the overall burdern movement. The non-uniform discharging rate leads to a large stagnant zone on one side of the shaft furnace. CGD has a great influence on the solid flow pattern of furnace, and there may be two stagnant zones where the small particles tend to segregate. The distribution of particles velocity along the radial is different with the distance from the bottom.