Patent ID: 6471911
Filing Date: 2002-10-29
Classification: B22D,C21C

Abstract:
A method for sealing a tap opening in a metallurgical container, the method comprising the steps of:providing a plug, comprised of a plug sleeve and a refractory flowable material; providing a metal rod or a metal pipe surrounded by a protective pipe, respectively, wherein the plug sleeve and the protective pipe are made of a material resistant with respect to a molten mass of metal in the metallurgical container only for a short period of time, wherein the material is a temporarily heat-insulating material which cokes within the molten mass of metal and is selected from the group consisting of cardboard or wood; controlling the time of introduction of the plug sleeve based on measured parameters of the molten mass; introducing the plug into the tap opening by guiding the plug with the metal rod or the metal pipe through the molten mass in the metallurgical container, wherein the plug sleeve changes by temperature action of the molten mass of metal such that the flowable material is distributed in the tap opening and seals the tap opening; and closing off the tap opening from the exterior of the metallurgical container and coking and destroying the plug sleeve in the tap opening as well as the protective pipe.