Protection against oxidation of molten metal streams in continuous casting

摘要

A shroud for enshrouding, in a shield of anti-oxidation gas, the molten stream which flows from the tundish into the mold and/or from the ladle into the tundish of continuous casting apparatus. The shroud includes a platform from which there extends a projection having the shape of a frustrum of a circular cone terminating in a circular opening. The shroud is formed from a plate having an opening therein by hydraulically deep drawing the material around the opening. A nipple is provided in the projection for injecting the anti-oxidation gas. In contrast to the flow of the gas in the use of prior-art shrouds, the gas, in the practice of this invention, flows in a helical or cyclonic path about the molten stream and effectively protects the stream against oxidation.