CONTINUOUS CASTING DEVICE OF SLAB AND ITS CONTINUOUS CASTING METHOD

A continuous casting device of slab for producing a high quality slab in which flaw of a product is suppressed by controlling turbulence of molten metal flow in a continuous casting mold. Its continuous casting method is also provided. The continuous casting device (10) comprises a submerged nozzle (11) where the central axis of ejection openings (13) provided on the opposite sides of a tubular body (18) is set within a predetermined range, and a continuous casting mold (12) where electromagnetic stirrers (15) are provided in wide long piece members (21, 22) forming a space section (23) having a rectangular cross-section, and produces a slab by supplying molten metal (14) into the casting mold (12) through the ejection openings (13) of the submerged nozzle (11) and solidifying the molten metal while stirring by means of the electromagnetic stirrers (15). Upper end position of the ejection opening (13) is set below the lower end position of the electromagnetic stirrer (15), and a magnetic shielding plate (16) for regulating a magnetic field being generated is provided at a lower position of each electromagnetic stirrer (15). Assuming the thickness in the height direction of the core (24) of the stirrer (15) is h, the interval s in the height direction of the magnetic shielding plate (16) and the electromagnetic stirrer (15) is set in the range of h/5-h.