NOZZLE FOR CONTINUOUS CASTING

摘要

PURPOSE:To restrain fining-down and flowing-out of zirconia grain and to give high erosion resistance by using the specific zirconia-graphite quality material to the part contacting with mold powder in an alumina-graphite quality submerged nozzle. CONSTITUTION:In the alumina-graphite quality submerged nozzle using to steel continuous casting, the zirconia-graphite quality material containing 50-90wt.% zirconia and 10-40% graphite is used to the part contacting with the mold powder. The zirconia material mixed at 60/40-90/10 ratio of non-stabilized zirconia and lime-stabilized zirconia is used. By using the nozzle for continuous casting, the erosion resistance at powder-line is improved and continuous casting is stably executed.