| abstract |
In a continuous casting nozzle in which an MgO-CaO-based material is applied to an inner hole side layer, the outer side layer is not cracked due to a difference in thermal expansion between the inner hole side layer and the outer side layer as a main body material. And preventing the inner hole side layer from being peeled off during casting as well as having the property of fixing the inner hole side layer to the outer peripheral side layer in a predetermined arrangement. The intermediate layer includes 10% by volume to 75% by volume of a hollow refractory aggregate that satisfies a ratio of an average particle radius R to an average wall thickness t of the particles of R / t ≧ 10, and As a proportion of the balance other than the hollow refractory aggregate, one or more of single metals or alloys of Al, Mg, Si are converted into only those metal components, and a total of 0.5% by mass or more and 15% by mass % Or less, and a refractory containing 2 mass% or more and 99.5 mass% or less of carbon is used. As the inner hole side layer 2, an MgO—CaO-based refractory is used. [Selection] Figure 1 |