| abstract |
An electric furnace having a cylindrical furnace wall, a furnace cover provided on the upper end of the furnace wall, and a furnace bottom provided on the lower end of the furnace wall and having a deep bottom and a shallow bottom, the shallow bottom being relative to the deep bottom In the region where the height of the deepest part of the bottom is 150 mm or more and 500 mm or less, the electric furnace is provided with a slag input port that can be directly charged from the slag transport container, or can be fed into molten slag or solidified slag lumps from the slag transport container through an inclined launder, The slag input port overlaps with the shallow bottom in plan view, and the area ratio of the shallow bottom with respect to the furnace bottom in plan view is 5% or more and 40% or less. |