Electric furnace

An electric furnace comprising:

• a cylindrical furnace wall;
• a furnace cover that is provided at an upper end of the furnace wall;
• and
• a furnace bottom that is provided at a lower end of the furnace wall and includes a deep bottom portion and a shallow bottom portion as a region having a height of 150 mm to 500 mm from a deepest point of the deep bottom portion,
• wherein a slag pouting port into which molten slag or a solidified slag lump is capable of being poured from a slag transport container directly or through a tilting trough is provided,
• the slag pouring port overlaps the shallow bottom portion in a plan view, and
• an area ratio of the shallow bottom portion to the furnace bottom in a plan view is 5% to 40% and further comprising:
• a tilting portion that is configured to tilt the electric furnace;
• a slag hole that is provided at a position of the furnace wall higher than a maximum height of the shallow bottom portion and through which molten slag is discharged;
• and
• a furnace bottom tap hole that is a bottom hole of an electric furnace projected portion immersed in molten iron during the tilting of the electric furnace and that is provided at a position confronting and aligned with the slag hole on an extended position of the deep bottom portion and through which the molten iron is discharged by tilting.