Abstract: Provided are a furnace shell with a lower electrode at a bottom of the shell, a furnace roof adapted to close an upper portion of the furnace shell, a material charge port substantially at a center of the furnace roof and two upper electrodes positioned laterally opposite to each other with respect to the material charge port and vertically extending through the furnace roof. Scrap material is continuously charged through the material charge port and arcs are directed to the scrap material at a center of the furnace shell.