POURING NOZZLE FOR TWIN BELT TYPE THIN SLAB CONTINUOUS CASTING

摘要

PURPOSE: To prevent the development of stuck material and stabilize the operation by fitting a boron nitride or a ceramic containing the boron nitride on the outer surface of the tip of a pouring nozzle for twin belt type thin slab continuous casting dipped into molten steel. ;CONSTITUTION: In the pouring nozzle for twin belt type thin slab continuous casting producing flat slab in the cross section, the ceramics which is difficult to wet to the molten steel, even if the metal is stuck, the metal is easily fallen down, is fitted on the outer surface of the tip of the nozzle dipped into the molten steel in a mold. Since it is necessary to be not cracked against the thermal shock and be stable to the heat as kind of the ceramics, the boron nitride or the ceramics containing the boron nitride is selected. That is, at the part having a specific height from the tip of the nozzle body 6 composed of alumina-graphite, the boron nitride or the ceramics 14 containing the boron nitride having few mm thickness is fitted with inorganic height temp. adhesive without making any gap. By this method, the sticking of the metal to the tip part of the pouring nozzle is not developed.;COPYRIGHT: (C)1994,JPO