CO2 Emission Calculation Model of Integrated Steel Works Based on Process Analysis

Iron and steelmaking consumes large amounts of fuel and CO2 emissions are also huge. In this paper, a new calculation model was proposed to calculate CO2 emissions based on process analysis, and the technical emission and combustion emissions were distinguished to reflect the CO2 emission characteristics in iron and steel production. As for electric arc furnace (EAF) steelmaking, the results of the CO2 emissions calculation show that the CO2 emission intensity of the enterprise's EAF process was 53.84 kg/t-cs, including electric emissions and non-electric emissions. The electric emissions were calculated as 41.09 kg/t, accounting for 76% of the total emissions. Considering the complexity of power consumption in iron and steel enterprises, a calculation method based on electric power structure was applied to determine the power emission factor. Finally, the carbon flow of the entire process was analyzed, and the possible ways for carbon reduction in steel complexes was discussed.