Determination of Experimental Method for Al₂O₃ Clogging under Near Working Conditions

Abstract

Negative pressure inside submerged entry nozzle (SEN) during continuous casting process will cause the external air to enter the SEN to cause the secondary oxidation of the molten steel and accelerate the SEN clogging. Based on it, this paper innovatively designed an Al₂O₃ clogging experimental method under near working conditions, and verified its feasibility. Compared with the existing experimental methods, this new experiment method stimulates the working conditions, ensures the stable source, content, and size of Al₂O₃ inclusions around specimens. The new test method is used to determine that that the calcium stabilized ZrO₂ lining had the better anti-clogging effect.