Patent ID: 8776863

Claim:
A molten metal pouring nozzle comprising: a main body portion including at least one molten metal passage and made of a fire-resistant substance; and a sleeve fitted in the at least one molten metal passage of the main body portion, the sleeve being made of a material having a heat conductivity of 10 to 30 W/(m·° C.) which does not react with the molten metal; wherein the sleeve includes an outwardly protruding flange portion including a molten metal inlet axial end surface of the sleeve; the main body portion includes a stepped portion arranged to accommodate the flange portion of the sleeve therein at an inlet side end surface of the at least one molten metal passage of the main body portion; the sleeve is fitted in the at least one molten metal passage of the main body portion such that the sleeve is prevented from being pulled out of the at least one molten metal passage of the main body portion due to the flange portion of the sleeve being accommodated in the stepped portion of the main body portion; the molten metal pouring nozzle is arranged such that the molten metal inlet axial end surface of the sleeve is not in contact with the molten metal in a metal receiving portion; and a material of the sleeve is any one of silicon nitride, silicon carbide, boron nitride, and graphite.