Submerged entry nozzle for use in continuous casting

Abstract

This invention relates to a submerged entry nozzle for use in a continuous casting process, which includes a main body portion 11 formed by an AG refractory material; an internal hole portion 12 made of a graphite-less refractory material which contains 90 wt % or more of a spinel, with a total content of other components being 10 wt % or less; portions 13 surrounding the discharge openings, which are formed by a graphite-containing refractory material containing 5 to 35 wt % of a graphite, 65 wt % or more of a spinel (MgO—Al2O3), with a total content of other components being 10 wt % or less; and a powder line portion 14 formed by a ZrO2—C refractory material. The present submerged entry nozzle is suitable for use in casting various types of steel such as high concentration oxygen-containing steel, high concentration Mn-containing steel, Ca-treated steel, and stainless steel.

Dependencies are inferred from the claim text.