| 摘要 |
<p>PURPOSE: To provide a melting method of steel scrap, by which the heat conductive efficiency is improved by developing vertical circulating flow so that the upper layer of slag shifts from a furnace wall to a furnace center part, the lower layer of slag shifts toward the furnace wall direction and the contacting part of the slag with the furnace wall shifts upward, by combining a top-blown lance and a side-blown lance into the optimum condition. CONSTITUTION: In the method for melting the steel scrap while producing the slag by charging carbonaceous material with a top-blown or a top and bottom combined blown refining furnace, gas is horizontally blown in the range of 0-1/2 from the slag layer 4 with the side blowing tuyere 5 arranged at the furnace wall. The slag 4 is rotated from the furnace wall side of the slag surface layer to the center side of the slag surface layer. As the other way, instead of horizontally blowing the gas from the side blowing tuyere, the gas is blown toward slantly upward.</p> |
