Sustainable Mining and Metallurgy

In order to evaluate the synergistic performance of pollution reduction and carbon reduction in hydrogen based shaft furnace process, this paper constructed a synergistic performance evaluation system for pollution reduction and carbon reduction in hydrogen based shaft furnace process. The coupling coordination degree model was used to construct the synergistic index among pollutant emission, carbon emission and cost control. The synergistic effect of pollution reduction and carbon reduction in traditional blast furnace converter long process and three hydrogen based shaft furnace processes (hydrogen produced by coke oven gas , hydrogen produced by natural gas, hydrogen produced by green electric) was evaluated. The research shows that the all green electric green hydrogen process has the best performance in reducing pollutant emissions and carbon emissions. In terms of cost, the comprehensive cost of the all green electric green hydrogen process is the highest ; comparing the synergistic index of pollution reduction and carbon reduction of each process, the coordination between pollution reduction, carbon reduction and cost control of hydrogen based shaft furnace process is stronger than that of long process blast furnace converter process. Among them, the synergistic indexes of pollution reduction and carbon reduction of coke oven gas hydrogen production process and natural gas hydrogen production process are 0.843 and 0.722, respectively, which reach the level of good coordinated development and intermediate coordinated development. Due to the high cost of the all green electric green hydrogen process, the synergistic effect of pollution reduction and carbon reduction is second, and the synergistic index of pollution reduction and carbon reduction is only 0.463, which is on the verge of imbalance and recession. If the electricity price cost and discount rate can be reduced, the overall coordination effect will also increase.