CONTINUOUS CASTING METHOD USING TWIN-MOLD, ELECTROMAGNETIC BRAKING APPARATUS FOR TWIN-MOLD AND MOLD FOR CONTINUOUS CASTING

摘要

PROBLEM TO BE SOLVED: To perform the optimum control of an electromagnetic brake at the narrow width time and at the wide width time with one set of an electric source device.;SOLUTION: In the case of casting by using a twin-mold changeable to the width of both sub-molds 3a, 3b parted with a water-cooled copper plate 3c for parting, inserted into the width center part by individually moving both short wall sides 3d at the outside in the width direction of the mold, a method for continuous casting is performed by setting the total eight pieces of electromagnetic coils 3e for braking by acting the electromagnetic force to molten steel spouted flow from each spouting hole of an immersion nozzle 2 having two holes whose spouting direction is the width direction of the mold at the outer peripheral part of the copper plate of the mold. It is selected by using a changeover circuit at the electric source device 7 side, whether only two of the molten steel spouted flows directed to the interval between the immersion nozzle 2 and the water-cooled copper plate 3c are braked, or the whole four molten steel spouted flows are braked, according to the width of the above sub-molds 3a, 3b at both sides. The brake efficiency can be improved by performing the optimum electromagnetic brake control according to the casting width.;COPYRIGHT: (C)2005,JPO&NCIPI