| 摘要 |
PURPOSE:To uniformize developing velocity of solidified shell toward width direction of cast slab, to restrain variation of molten surface and to improve the quality of inner and outer sides of cast slab by arranging shelters regulating molten metal flow between a flow-out hole at lower part of submerged nozzle and circulating bodies. CONSTITUTION:The shelters 9, 9' are arranged between the submerged nozzle 5 and metallic belts 1, 1' at almost wedge-shape casting space composing of one pair of circulating metallic belts 1, 1' keeping gap for holding the molten metal over the fixed distance and fixed side plates 3 arranged at both side edge parts of these belts. When the molten metal is flowed out from the nozzle 5 at the time of casting, the flowing velocity of molten metal at the position contacting with the solidified shell 8, 8' is made to uniform toward width direction of the cast slab and as a result, the developing velocity of solidified shell 8, 8' is made to uniform toward width direction of the cast slab. Further, inert gas, such as Ar gas, is supplied from the holes 11, 11' in cores 10, 10' at the upper part of casting space and oxidation of the upper part of casting space and oxidation of the molten metal in the casting space is prevented. |
