Research and Development on Low Carbon Technologies of Modern Blast Furnace Ironmaking

Under the modern blast furnaceBlast furnace process conditions, replace the coke or pulverized coal by hydrogenHydrogen; improve the efficiency of hydrogen reductionReduction in the blast furnace; realize carbon-hydrogen coupling reduction in different process section and temperature range; give full play to the advantages of carbon direct reduction, CO indirect reduction, and H2 reductionReduction in heat transfer, mass transfer, momentum transmission, and metallurgical reaction engineering, through process development and operation optimization; reduce carbon fuel consumption and blast furnaceBlast furnace fuel ratioFuel ratio to below 460 kg/t; and realize rich hydrogenation and low carbonizationCarbonization of blast furnace iron makingIronmaking process. The changes of theoretical combustion temperature of tuyere raceway and bosh gas volume of the blast furnaceBlast furnace are researched. The reductionReduction thermodynamic parameters of different temperature range and zone of blast furnace are calculated. The process measures of improving hydrogenHydrogen utilization ratio and hydrogen carbon replacement ratio in the operation of blast furnace are discussed.