Study on the materials and energy condition of using four furnace charges in EAF steelmaking process

The 150 t EAF steelmaking of Tianjin Pipe Group Co.,Ltd uses four furnace charges for a long time,its average furnace charge is scrap of 46.2%,pig iron of 9.1%,hot molten iron of 26.4%,and DRI of 18.3%,the material and energy consumptions in the EAF steelmaking process were analyzed through the material and energy balance calculations. The influence of unit furnace charge on the material and energy consumptions in research process was obtained,as well as the input scope of electric power required by the compositions change of four furnace charge is 153～744 kW. Based on the stepwise regression analysis to the mass production data,it is found that the influence of RDRI is most remarkable. If it increases 1.0% every time,the electric power consumption per ton steel probably increases 1.4 kWh. Next impact factor is RHM. If it increases 1.0% every time,the electric power consumption per ton steel probably reduces 2.0 kWh.