METHOD FOR DETECTING SLAG OUTFLOW IN CONTINUOUS CASTING

PROBLEM TO BE SOLVED: To provide a method for detecting slag outflow in continuous casting capable of rapidly and reliably detecting the slag outflow at the terminating state of filling even when performing the continuous casting of high-grade steel using a seal tube. SOLUTION: A hole 10 for measurement is formed in the upper side wall of the seal tube 6 installed between a ladle 2 and a tundish 1, and the radiation energy of a filling flow 7 is measured via the hole 10 for measurement by a radiation energy measuring instrument 11 installed at a remote position. When the slag starts to flow out, a radiation energy level is raised, and the slag outflow is detected on the basis of the change of the level. Inert gas is blown into the seal tube 6 to prevent any contact of air with a molten metal. COPYRIGHT: (C)2008,JPO&INPIT