TWIN-ROLL TYPE CONTINUOUS CASTING METHOD FOR CONTINUOUSLY CASTING CAST STRIP EXCELLENT IN SURFACE CHARACTERISTIC

摘要

PROBLEM TO BE SOLVED: To continuously cast a cast strip excellent in the surface characteristic by restraining entrapment of deposited or floating scum on molten steel surface in a molten steel pool part between the peripheral surfaces of cooling rolls and solidified shells, in a twin-roll type continuous casting. SOLUTION: In the twin-roll type continuous casting method for continuously casting the cast strip while cooling and solidifying the molten steel on the peripheral surfaces of these cooling rolls by pouring the molten steel into the molten steel pool part formed with a pair of the cooling rolls having parallel axes and rotating to mutually reverse directions and side weirs, almost the whole range or a part of the molten steel surface in the molten steel pool part is covered with solid oxide. The solid oxide is made of solid phase of one or more of plate-like solid oxides or the scum. The solidification of the scum is made by blowing cooling gas to the scum and/or by adding a cooling- solidifying agent.