Apparatus and method for continuous casting of steel

B - Operations – Transporting – 22 – D

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B22D 11/00 (2006.01) B22D 11/10 (2006.01) B22D 11/11 (2006.01) B22D 27/02 (2006.01)

Patent

CA 2105524

An apparatus and method for continuous casting steel. A vertical continuous-casting mold consists of a pair of long side frames and a pair of short side frames formed of a metal having low electrical conductivity. An immersion nozzle supplies molten steel to the mold. An induction heating coil surrounded by a backup frame surrounds the vertical continuous-casting mold. The induction heating coil induction-heats the surface of the molten steel and neighboring portions thereof. The apparatus meets the following conditions; .epsilon.2 = .sigma.1/.sigma.2 ~ 4 1/10 ~ ~ = (2µ0 ~.sigma.2 ~.omega.) 0.5 ~ d ~ 10 where .epsilon. designates the ratio of electrical conductivity of the mold and the molten steel .sigma.1 designates the electrical conductivity of the mold .sigma.2 designates the electrical conductivity of the molten steel µ0 designates the permeability in a vacuum d designates the thickness of the mold .omega. designates the pulsatance of electromagnetic wave ~ designates the ratio of the penetration depth of the magnetic field to the molten steel to the mold thickness.

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