CONTINUOUS CASTING DEVICE FOR WEAKLY DEOXIDIZED STEEL

摘要

PURPOSE:To decrease deposition and to improve the yield of an ingot as a result of non-oxidation casting by embedding porous refractories having a specific sectional area or above into the specific position on one intermediate side face of a flow regulating nozzle made of non-porous refractories in the lower position of the tap hole of a tundish and blowing an inert gas through said refractories. CONSTITUTION:The flow straightening nozzle 5 made of the non-porous refractories is interposed between an insert nozzle 4 and immersion nozzle 6 of the tundish 1. The porous refractories 15 are embedded to the one intermediate side face within a narrow range of about + or -30 deg. along the mold 2 surface of the nozzle 5 and the diameter thereof is made about >=15% of the outside diameter of the flow regulating nozzle. The deposition in the nozzle is decreased by blowing the inert gas through such refractories 15. The yield of the ingot is thus improved by the non-oxidation casting.