Refractory for gas blowing for molten metal refining vessel.

摘要

A refractory for gas blowing to be attached to an opening of a molten metal refining vessel, which comprises: a gas permeable portion comprising an alumina refractory, the gas permeable portion having a plurality of gas blowing apertures running therethrough in the axial direction thereof; and a collar portion comprising an alumina refractory, formed integrally with the gas permeable portion so as to surround the gas permeable portion. The above-mentioned alumina refractory contains at least 88 wt.% alumina and is non-porous with a porosity of up to 20%. <IMAGE>