2021 Volume 61 Issue 6 Pages 1808-1813
In order to reduce energy consumption in the blast furnace ironmaking process, it is important to promote not only rapid reduction of ore but also carburization and melting of metallic iron. In this study, the use of carbon-iron ore composite which is an agglomerate of fine iron ore and carbonaceous material was focused on, and the effects of ore type and slag content on carburization and melting of metallic iron were examined.
The reduction, carburization, and melting behavior of the composite samples prepared using carbonaceous materials and iron oxide such as various fine ores, goethite and hematite reagents were evaluated under heating condition up to 1573 K. The composite of hematite reagent with the additions of SiO2 and Al2O3 reagents was also used to control the gangue composition.
Carburization and melting phenomena of metallic iron due to direct contact with graphite were observed in the composite samples made of pisolite ore and hematite reagent at the same slag composition. Carburization phenomenon was accelerated with increase in slag content.