Nozzle for use in continuous casting of steel

Details Nozzle for use in continuous casting of steel Nozzle for use in continuous casting of steel

B - Operations, Transporting

22

D

B22D 11/10 (2006.01) B22D 41/54 (2006.01)

Patent

CA 2242243

The object of the present invention is to provide a nozzle for use in continuous casting of steel which simultaneously provides resistance to adhesion of Al2O3 inclusions, damage resistance, and spalling resistance. The nozzle for use in continuous casting of steel according to the present invention is characterized in that the refractory material of at least the interior surface of the nozzle and/or the portions to come into contact with molten steel is composed of amorphous silica and alumina and has a chemical composition of 5 to 40 percent by weight of SiO2, 60 to 95 percent by weight of Al2O3, and 3 percent by weight or less of unavoidable impurities.

Busette pour coulée continue d'acier, ayant une excellente résistance à l'adhésion d'inclusions d'Al2O3, à la rupture et à l'écaillage. La busette est caractérisée par le fait qu'au moins la couche de surface interne et/ou la partie destinée à être mise en contact avec l'acier en fusion est constituée d'un matériau réfractaire contenant de la silice amorphe et de l'alumine, et ayant la composition suivante: 5 à 40 % en poids de SiO2, 60 à 95 % en poids d'Al2O3 et 3 % en poids ou moins d'impuretés inévitables.

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