Sumitomo Metal Industries, Inc.

Masahiko Oka

Toshihiko Murakami

Kazuharu Hanazaki

Hirohisa Kikuchi

Masahito Hanao

Kazuo Okamura

Masayuki Kawamoto

Seiji Kumakura

Masakazu Koide

Takashi Usui

Atsushi Murata

Among the slab-supporting guide roll pairs disposed in the region in which a liquid core exists within the slab, at least four consecutive guide roll pairs are disposed under such conditions that the roll axis-to-axis distances on the fixed side and loose side of the guide roll pairs and the roll halfway-to-halfway distances on the fixed side and loose side are all different from one another. Casting is carried out while disposing the guide roll pairs under sucb conditions.

Machine and method for continuous casting of steel

A method and apparatus for controlling the level of molten metal in a mold for continuous casting by using a molten metal level control system incorporating a molten metal level controller in the control loop thereof, which comprises damping selectively the predetermined frequency of frequencies of periodical molten metal level fluctuations through a notch filter installed in the control loop. The control loop preferably includes the phase compensation calculation part for compensating the phase delay of the stopper opening position control signal for adjusting the amount of the molten metal to be fed to the mold. The control apparatus in the control loop comprises a molten metal level senser, an FFT analyzer, an automatic tuning device for dealing with the results of the FFT analysis, a molten metal level controller and a notch filter.

Method and apparatus for controlling the molten metal level in a mold in continuous casting

A method of continuous casting of a steel employs a mold power having a viscosity of 0.5-1.5 poise at 1,300&deg; C. and a solidification temperature of 1,190-1,270&deg; C., in which the mass ratio of CaO to SiO is 1.2-1.9, and casting is carried out under the following conditions: casting speed is 2.5-10 m/minute; mold oscillation stroke is 4-15 mm; and specific cooling intensity in secondary cooling of a slab is 1.0-5.0 liter/kg-steel.

Method for continuous casting of steel

Continuous casting method and apparatus thereof

Method for controlling the level of molten metal for a continuous

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Ikeda, Japan

Masahiko Oka