Analysis of Heat and Mass Transfer for Hydrogen-enriched Direct Reduction Process Based on DEM-CFD

Hydrogen utilization in a direct reduction shaft furnace is a promising technology for carbon neutrality. On the other hand, some kind of heat compensation appears to be necessary, because the temperature in the furnace decreases and the reduction degree stagnates due to hydrogen enrichment. Therefore, a tool which can quantitatively evaluate the efficiency of heat compensation from a kinetic viewpoint considering detailed heat and mass transfer is useful for operational design. Based on the above, a numerical simulation model based on DEM-CFD was developed for the direct reduction process, and the following findings were obtained.