Reduction effects of CO2 emission from steel products by reduction agent injection into blast furnace

The reduction effects Of CO2 emission from typical steel products by the re duction agent injection into blast furnace were analyzed by Life Cycle Asse ssment methodology, using the statistical data. As the results, the reduction effects by pulverized coal injection and wast e plastic injection were estimated to be 0.07 kg and 0.16 kg-CO2 at the poi nt of 0.1 kg/kg-HM of injection, respectively. As the coke is replaced with pulverized coal on the equivalent in carbon content, the CO2 emission from the coke manufacturing is reduced. And the reduction effect Of CO2 emissio n by waste plastic injection is higher than that by pulverized coal injecti on, because the replacement ratio of coke with waste plastics is higher. Th e injection ratio of waste plastics would not be raised to the same ratio a s the pulverized coal in the viewpoint of the material balance of waste pla stics.