| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for melting the deposited metal which secures the productivity of a converter while restraining the erosion of refractory in the converter and the deposition of metal at the furnace opening hole part and the side wall in the furnace. SOLUTION: Raw material consisting essentially of molten iron as iron source is charged into the converter type refining furnace 1, and a lance arranging oxygen nozzles 7 for melting the deposited metal on the outer periphery is inserted from the furnace opening hole part 14 of the refining furnace and the reaching height of blowing locuses of the oxygen for melting the deposited metal to the furnace opening hole part and the side wall in the furnace, is controlled so as to become lower than the heights of the deposited metals 8 and 16. Jetting direction of the oxygen jetting from the oxygen nozzles 7 for melting the stuck metal, is made to the downward direction of 40-90 deg. in the angleθformed with the axial line in the longitudinal direction of the lance or the horizontal direction. Further, the molten iron having P concn. by pre- dephosphorizing to the P concn. demanded in a product or lower, is used.
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