140 Use of Hydrogen Rich Gas in Blast Furnace Ironmaking of V bearing Titanomagnetite Mass and Energy Balance Calculati

The iron and steel industry is a major CO2 emitter and an important subject for the implementation of carbon emission reduction goals and tasks. Due to the complex ore composition and low iron grade, vanadium–bearing titanomagnetite smelting in a blast furnace consumes more coke and emits more carbon than in an ordinary blast furnace. Injecting hydrogen–rich gas into blast furnace can not only partially replace coke, but also reduce carbon emissions. Based on the whole furnace and zonal energy and mass balance of the blast furnace, this study establishes the operation window for smelting vanadium–bearing titanomagnetite under the premise that the thermal state of the blast furnace remains unchanged (raceway adiabatic flame temperature and top gas temperature). The effects of different hydrogen–rich gas injection amounts (shale gas, coke oven gas, and hydrogen) on raceway adiabatic flame temperature and top gas temperature, along with the influences of blast temperature and preheating temperature of hydrogen–rich gases on the operation window are calculated and analyzed. This study provides a certain understanding of the potential for reducing coke consumption and carbon emissions in the ironmaking process.