Patent ID: 6231806
Filing Date: 2001-05-15
Classification: B22D,C21C

Abstract:
A device for injecting a gas or gasses into a container containing a liquid molten metal, metals or fused alloys, comprising:a first member for indicating the end of the useful life of a plug in said container or of a refractory part of said container, wherein the first member contains a carbon steel or stainless steel tube with a diameter of 2 to 8 mm and which, by fusion of the steel tube, when said tube is in contact with the metal, metals or fused alloys, interrupts the flow of gases in said tube, thereby indicating the end of the useful life of said plug or said refractory part of said container; andwherein an end of the carbon steel or stainless steel tube is exposed and sealed with a sealing means that allows for the testing of gas output.