Abstract: Establishing mathematical models to predict the production status and process parameters of electric arc furnace is of great practical significance to guide production. A dynamic model of electric arc furnace steelmaking was established based on energy efficiency and metallurgical reaction principle, including four moudles: competitive oxidation moudle, energy input moudle, scrap melting and bath heating moudle and temperature solving moudle, to simulate the electric arc furnace steelmaking process. The typical production parameters of an electric arc furnace and the smelting parameters reported in the literatures were substituted into the model for calculation and verification. It was found that the error of simulation temperature and measurement temperature was -7 ℃, the mass fraction error of C, Si ,Mn, and P was 0.017 %、-0.001 %、0.037 %, and -0.000 5 %, respectively. In the meanwhile, the “pick up” of phosphorus could be observed, and the benefits of hot heel on scrap smelting and process performance were demonstrated. The actual production simulation results for multiple heats also showed good prediction results, confirming the good generalizability of the model. The development of this model provides necessary tools to optimize processes and design operational practices to improve the performance and competitiveness of electric arc furnace.

Key words: EAF, dynamic model, energy efficiency, competitive oxidation