COOLING AND REMOVING METHOD FOR RESIDUAL MOLTEN METAL IN VESSEL

摘要

PURPOSE:To shorten the time for treatment in the stage of cooling and removing the residual molten metal contg. slag in a vessel by combination use of air and water cooling by exposing and cooling the top surface of said metal in a prescribed range while mechanically crushing the solidified slag. CONSTITUTION:A tundish 2 having the residual steel 3 after completion of casting is imposed on a base and after a tundish cover is removed, a water cooling carriage 16 is transported onto the tundish 2. Water is sprayed like a mist from water cooling nozzles 12 and at the same time the air is blown from an air blower 8 to cool the molten steel. The residual slag 6 is crushed by a rotary crusher 20 to expose the surface of the residual steel 4 while the slag 6 is solidified or under solidification. The crusher 20 traverses randomly and crushes the slag so as to maintain the exposing degree of the surface of the residual steel 4 in a 2-20% range. On the other hand, water cooling and air cooling are executed in parallel. The cooling effect is thereby improved and the time for cooling is considerably improved.