Carbon Footprint Analysis of Processes in Typical Steel Enterprises

As an industry with high energy consumption and significant pollution, the steel industry is one of the industries with the largest carbon emissions. This paper analyzes the carbon footprint of steel enterprises, considering its calculation boundary, calculation methods and emission factors, and establishes an input-output model based on the life cycle method and input-output method to analyze the carbon footprint of steel enterprise; Taking the actual production data of a steel enterprise as an example, the carbon footprint analysis is carried out. The results show that the carbon footprint of the steelmaking process accounts for 37.29% of the carbon footprint of the entire iron and steel enterprise, followed by 28.12% of the sintering process; From the perspective of various greenhouse gas emissions, CO
2
emissions have the largest carbon footprint, accounting for 90.57% of the total carbon footprint, while CH
4
and N
2
O emissions are relatively small, accounting for 0.18% and 9.25% of the total carbon footprint respectively. Through the carbon footprint analysis in this paper, a set of energy-saving and carbon-reduction measures can be established to optimize each process, which using blast furnace gas, electricity and pellets rationally can be used to reduce the use of coke and anthracite. By collecting and utilizing greenhouse gases such as CH
4
and N
2
O, the sustainable development of steel enterprises can be realized.