| 摘要 |
PURPOSE:To improve casting efficiency and the quality of a cast slab without allowing slag to flow into a tundish by assembling a fire resistant pipe having penetrating fine hole to a part of blowing hole system of inert gas, etc., in a nozzle body as built-in. CONSTITUTION:The fire resistant pipe 10 having penetrating fine hole 12 is set to the nozzle for continuous casting, such as long nozzle, submerged nozzle. At the time of introducing the inert gas into the penetrating hole 8 from a blowing metal fitting 6, the inert gas is blown into inner hole 3 of the nozzle through the penetrating fine hole 12 in the refractoriness pipe 10 and the penetrating hole 9 near the inner hole 2 of the nozzle. By this method, the blowing of the inert gas is surely and stably executed and flowing of non-metallic inclusion into the tundish and mold can be prevented. |
