LINER FOR SUBMERGED ENTRY NOZZLE

摘要

A fired carbon-boned, oxide refractory body for use in casting aluminium-killed steel has a metal contacting surface which is resistent to both steel erosion and buildup of alumina. The layer (18) is formed by first firing the pressed body in an oxidizing atmosphere to form a porous oxidized zone on selected steel contacting surfaces. The remaining surface portions of the body are protected against oxidation during firing by a glaze applied prior to firing. A carbon free refractory slip or slurry is infiltrated into the porous oxidized zone to create the erosion and buildup resistant surface layer (20). A preferred infiltrant material is alumina.