Production method of the continuous casting slab and the electromagnetic stirring apparatus null in the continuous casting

摘要

PROBLEM TO BE SOLVED: To stabilize surface layer defects in a slab in a low level by changing the phase relationship of a pair of linear motors according to the length on the long side of the rectangular slab to control the center position of the vortex of the agitation force and smoothly turning the entire molten metal in a mold. ;SOLUTION: A pair of linear motors are disposed facing each other on the long sides of the mold of rectangular section, and when the moving magnetic fields advancing in the directions opposite to each other are generated to turn and agitate the molten metal in the mold, a change-over switch 17 to change the phase of the current flowing in each coil 15 of one linear motor 11B of a pair of linear motors 11A and 11B by 180° at the same time is provided, and the phase of a pair of the linear motors 11A and 11B to the same phase or the opposite phase according to the length of the long side of the slab.;COPYRIGHT: (C)2001,JPO