METHOD OF AND EQUIPMENT FOR CONTINUOUSLY CASTING MOLTEN METAL

Japanese Patent JP3779809

B2

PROBLEM TO BE SOLVED: To accurately measure a molten metal surface level by detecting on-stage and off-stage of the electromagnetic coil pulse and by measuring the molten metal surface level only at off-stage of the pulse.
SOLUTION: A molten metal 3 is cast from a nozzle 2 for casing in a mold 1 for continuous casting. A current sensor 13 is installed in a cable 12 between a power source 11 and an electromagnetic coil 4, and the current signal is detected. As to the current is signal detected, the absolute value detection is carried out with an absolute value detection circuit 15. An arithmetic unit 16 creates a pulse trigger signal 17 so that the sampling may be carried out at off-stage of a pulse magnetic field and transmit the signal to a molten metal level sensor signal processing mechanism 18. The signal processing mechanism 18 samples or holds the signal of a vortex style molten metal surface level sensor head part 5 in proportion to the pulse trigger signal 17. The signal including the noise which the electromagnetic coil 4 produces is removed, and the accuracy of the molten metal surface level control is improved.

JPS58163550	METHOD AND DEVICE FOR CONTINUOUSLY CASTING METAL
JP3348838	CONTINUOUS CASTING APPARATUS OF SEMI-SOLIDIFIED METAL
JP3734272	Equipment and methods for replacing tundish continuous casting tubes in steel mills

Kiyoshi Wajima
Keisuke Fujisaki
Hideki Matsuda
Masahiro Tani

JP36116197A

May 31, 2006

December 26, 1997

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Nippon Steel Corporation

B22D11/10; B22D11/115; G05D9/12; (IPC1-7): B22D11/10; G05D9/12

JP8197213A
JP890167A
JP6483348A
JP63111248U

Takashi Ishida
Takao Mitsui
Toshio Toda
Masaya Nishiyama

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