Numerical Simulation of Scrap Preheating with Flue Gas in EAF Steelmaking Process

EAF steelmakingEAF steelmaking process is served as energy intensive fields, which releases massive high-temperature flue gasFlue gas with consumption of extensive raw materials and energies. The effective utilization of wasteWastes heat is essential for energy conservation and emission reduction in the iron and steel industry. Scrap preheatingScrap preheating with flue gasFlue gas is a high-efficiency method for direct wasteWastes heat recovery and utilization. In this paper, the influence of scrap size and arrangement on preheating effectiveness was researched and simulated by ANSYS Fluent 18.2 software. The temperature distributionTemperature distribution characteristics and quantitative values of scrap were further calculated and analyzed. The results indicated that the average temperature of the scrap was higher than 500 °C after continuously being preheated for 15 min by flue gasFlue gas at 1200 °C. This study is beneficial for evaluating scrap temperature before charging to the EAF, and expected to facilitate green, low-carbon, and environmentally friendly development of efficient wasteWastes heat utilization in the EAF steelmakingEAF steelmaking process.