METHOD OF HOT REUSING TUNDISH FOCUSING ON TEMPERATURE DIFFERENCE BETWEEN PRECEDENT CHARGE AND SUBSEQUENT CHARGE

摘要

PROBLEM TO BE SOLVED: To provide a technique for preventing a blockage of a nozzle, and surely pouring molten steel from a tundish to a mold, during hot reusing the tundish. SOLUTION: An inside of a tundish 1 is once emptied, when continuous casting of a precedent charge is ended, and supply of the molten steel of a subsequent charge shall be started to the tundish 1, within 3 hours after the end of the continuous casting of the precedent charge, without heating the tundish 1. Molten steel temperature T [°C] of the subsequent charge shall satisfy a formula (1) (wherein TLL[°C] in the formula (1) means liquidus temperature of the molten steel of the precedent charge). COPYRIGHT: (C)2011,JPO&INPIT