Carbon emission evaluation and potential assessment of energy saving and carbon reduction for iron and steel enterprises

In order to quantitatively evaluate the carbon emission level and the potential of energy saving and carbon reduction of iron and steel enterprises, a set of index system framework and energy saving and carbon reduction potential evaluation model for the steel and iron enterprise are constructed. The improved fuzzy analytic hierarchy process(FAHP) is adopted to comprehensively evaluate the carbon emission level of a steel enterprise. With the data of the enterprise in 2016 as the base year, the current situation of the carbon emission level of the enterprise in 2021 and the trend of the future development level in 2025 were obtained through comparative analysis. The evaluation results show that, compared with the base year, the carbon emission level in 2021 and 2025 has a year-on-year growth rate of 229.21% and 275.7%, respectively. In the evaluation results, the comprehensive energy consumption per ton of steel has the biggest impact on the carbon emission level of the enterprise. According to the energy saving and carbon reduction potential assessment model based on gray prediction, the energy saving rate per unit output and carbon reduction rate per unit output in 2025 compared with the base year are 10.38% and 17.59% respectively.