METHOD FOR CONTROLLING SOLIDIFICATION COMPLETION POSITION AND DEVICE FOR CONTROLLING SOLIDIFICATION COMPLETION POSITION

摘要

The temperature calculating unit 101 estimates the surface temperature of the cast strand by an electric heating model using the operating conditions of the continuous casting machine so that the parameter correcting unit 102 calculates the surface temperature of the cast strand, Corrects at least one parameter among the thermal conductivity included in the heat transfer model, the heat transfer coefficient between the mold and the solidification shell, and the heat transfer coefficient of the secondary cooling zone so that the estimated value of the temperature coincides, Estimating the casting temperature and the solidification completion position of the casting by the heat transfer model using the calibrated parameter, calculating the manipulated variable of the secondary cooling quantity from the deviation from the predetermined solidification finished position target value, In which a casting temperature and a solidification completion position are estimated by an electric heating model using a parameter obtained by adding a secondary cooling quantity obtained by adding a manipulated variable calculated in the step Thereby controlling the secondary cooling.;