Numerical study of fine particles behaviors in a packed bed with lateral injection using CFD-DEM

Gas-fine flow in a packed bed with lateral injection is numerically studied to understand the distribution and clogging behaviors of fine particles. A variety of variables (e.g., diameter ratio, mass flux of fine particles, and rolling frictional coefficient) are investigated. The results show that with the decrease of diameter ratio, the cluster in the packed bed decreases and the dispersed fine particles increase. The number and size of cluster increase significantly as the mass flux of fine particles increases. With the increase of mass flux, the number of static fine particles in the orifice of the packed bed at the inlet latitude gradually increases. The rolling frictional coefficient significantly affects the fine particles behaviors in the packed bed. The number and ratio of static fine particles in the transverse (y) and longitudinal (z) directions at inlet latitude both increase with the increase of rolling frictional coefficient. The fines carried by reducing gas entering the COREX shaft furnace are mainly irregular, which is one of the reasons that promote the choking of the slot in shaft furnaces. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

The numerical study of gas-fine flow in a packed bed with lateral injection provides insights into the distribution and clogging behaviors of fine particles. Various variables such as diameter ratio, mass flux of fine particles, and rolling frictional coefficient impact the behavior of fine particles in the packed bed. The results indicate that changes in these variables lead to differences in the clustering and dispersion of fine particles in the packed bed.