Development of reducing CO_2 emission technologies of blast furnace ironmaking

Based on blast furnace operating conditions,the reducting agent consumption for an ideal blast furnace was calculated by Rist Operating Line model.Considering the calculation results and the potential of reducing CO2 emission in China,it is proposed that decreasing blast furnace fuel ratio is the main measure to reduce CO2 emission.In integrated iron and steel enterprises,there are many ways to reduce the fuel consumption of blast furnace,however,the energy balance of the whole enterprise should be considered.In this sense,some new technologies,such as Oxygen BF,top gas circulation,plastic injection and using prereduction burden,etc.may be adopted to reduce the CO2 emission of blast furnace ironmaking with high efficiency and good environment.