MELTING FURNACE FOR STEEL SCRAP AND MELTING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To prevent the flow-out of molten slag at the time of tapping molten steel and to enable a simple refining and a continuous refining in an adjacent space by arranging at least one of a molten steel tapping hole on the wall surface of an outer peripheral side in a double wall. SOLUTION: An oxygen top-blowing lance 2 is arranged in a converter 1 having a tilting means and the oxygen-containing gas is blown onto molten slag 4 on molten steel 3 from the lance. Separated with the inner space of a converter 1, an outer wall 10 is arranged on at least one of the furnace wall to form the double wall so as to arrange at least one of the adjacent space 9 at the outside of the furnace wall of the converter. Then, the inner space of the converter 1 and the adjacent space 9 are made to communicate with each other through at least one of hole 8 arranged at the lower part of the furnace wall. At least one of the molten steel tapping hole 7 is arranged on the wall surface of the outer peripheral wall 10. By this method, a large quantity of molten steel can quickly be tapped through the safe large diameter hole.