Molten metal level control method and device for continuous casting

A molten metal level control device for continuous casting by a continuous casting machine, which is equipped with a flow control actuator used to control input flow of molten metal into a mold, said molten metal level control device comprising:

• a molten metal level gauge means for measuring the molten metal level in the mold,
• an actuator position measuring instrument means for measuring the position of said flow control actuator,
• a flow disturbance estimation means for estimating flow fluctuations caused by disturbances of the molten metal flowing into or out of the mold, using values measured by said molten metal level gauge and said actuator position measuring instrument,
• a correction amount computing means for computing operation amount of said flow control actuator necessary to offset the estimated flow disturbance, and
• an actuator control means for controlling said flow control actuator on the basis of said operation amount.

A molten metal level control device for continuous casting by a continuous casting machine, which is equipped with a flow control actuator used to control input flow of molten metal into a mold, said molten metal level control device comprising:

• a molten metal level gauge means for measuring the molten metal level in the mold,
• a flow disturbance estimation means for estimating flow fluctuations caused by disturbances of the molten metal flowing into or out of the mold, using a value measured by the molten metal level gauge and a position command value for said flow control actuator,
• a correction amount computing means for computing operation amount of said flow control actuator necessary to offset the estimated flow disturbance, and
• an actuator control means for controlling said flow control actuator on the basis of said operation amount.

A molten metal level control device for continuous casting by a continuous casting machine, which is equipped with a flow control actuator used to control input flow of molten metal into a mold, said molten metal level control device comprising:

• a molten metal level gauge means for measuring the molten metal level in the mold,
• an actuator position measuring instrument means for measuring position of sad flow control actuator,
• a casting speed meter means for measuring casting speed,
• a flow disturbance estimation means for estimating flow fluctuation caused by disturbances of the molten metal flowing into or out of the mold, using values measured by said molten metal level gauge, said actuator position measuring instrument and said casting speed meter,
• a correction amount computing means for computing operation amount of said flow control actuator necessary to offset said estimated flow disturbance, and
• an actuator control means for controlling said flow control actuator on the basis of said operation amount.

A molten metal level control device for continuous casting by a continuous casting machine, which is equipped with a flow control actuator used to control input flow of molten metal into a mold, said molten metal level control device comprising:

• a molten metal level gauge means for measuring molten metal level in the mold,
• a casting speed means for measuring casting speed,
• a flow disturbance estimation means for to estimating flow fluctuation caused by disturbances of the molten metal flowing into or out of the mold, using values measured by said molten metal level gauge and said the casting speed meter and a position command value for said flow control actuator,
• a correction amount computing means for computing operation amount of said flow control actuator necessary to offset the estimated flow disturbance, and
• an actuator control means for controlling said flow control actuator on the basis of said operation amount.