To provide a method where, e.g., at the time when a slab is subjected to continuous casting, it is performed as the flow of molten steel in a mold is controlled, and to provide an electromagnetic force controlling device for molten steel in a mold for performing the continuous casting method where sufficient performance is secured in both of an electromagnetic brake and electromagnetic stirring.
The invention is a technique for selectively acting an electromagnetic brake or electromagnetic stirring on molten steel 3. At the outside of the long side of a mold, four electromagnetic coils are arranged by one with a dipping nozzle 2 held. Each iron core 4 is divided into two pieces, respectively, and exciting coils 5 are coiled around the outer circumferential part of the iron cores 4a, 4b. Exciting coils 6 are coiled around the outer circumferential part of the iron cores 4a, 4b. At the time of the electromagnetic stirring, the phase of alternating current made to flow through the two electromagnetic coils on each long side is reversed, and the flow velocity is controlled to ≥20 cm/s. At the time of the electromagnetic brake, direct current is made to flow through the exciting coils 5 coiled around the outer circumference of the two iron cores 4a, 4b or around the three exciting coils 5, 6 per exciting coil and a magnetic flux density of ≥0.15(T) is applied to the molten steel.
TAKATANI KOJI
KAWAMOTO MASAYUKI
Tetsuya Mizogami
Yoshinori Iwahara
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