ELECTROMAGNETIC STIRRING DEVICE AND METHOD FOR SECONDARY COOLING ZONE DURING SLAB CONTINUOUS CASTING

Disclosed in the present disclosure are an electromagnetic stirring device and method for a secondary cooling zone during slab continuous casting. The device comprises an electromagnetic stirring device main body, an opening adjustment assembly and a secondary cooling assembly. The stirring device main body comprises a protection housing (3), a phase sequence control assembly, an iron core (4) and an electromagnetic coil (5), and carries out variable-direction electromagnetic stirring on molten steel by means of three-phase current phase sequence transformation; the opening adjustment assembly comprises an air cylinder (7), a fixed base (8), a movable joint shaft (12) and a silicon steel sheet group insert (13), and adjusts, on a line, the opening degree of the closed annular iron core by means of a movable joint structure; and the secondary cooling assembly comprises a cooling water inlet (9) and a cooling water nozzle (10), and cooling water cools the electromagnetic coil and the iron core in a soaking manner and is sprayed to a surface of a cast slab (1) through the cooling water nozzle for secondary cooling. According to the present disclosure, magnetic field leakage or loss is small, the electromagnetic stirring efficiency is high, the opening degree of a stirrer can be adjusted on a line, the stirring direction is alternately changed, and the internal quality and performance of the cast slab are improved.