Patent ID: 6723275
Filing Date: 2004-04-20
Classification: B22D,C21C,F27D

Abstract:
A method for improving yield of molten metal poured from a discharge nozzle of a metal pouring vessel, the method comprising:introducing a vortex inhibitor having a uniform castable refractory body having a generally tapering shape along a longitudinal axis from a base toward a narrow end and a hollow chamber longitudinally to the body extending within the body and an elongate sacrificial member retained by the hollow chamber to form an integral body, whereby the integral body combining the refractory body and the sacrificial member has a specific gravity less than the specific gravity of molten metal, and is self-orienting in a narrow end downward position when supported in molten metal; and maintaining the vortex inhibitor in the metal pouring vessel during at least a portion of the metal pour, while dissolving the elongated sacrificial member before substantially obstructing the discharge nozzle.