| 摘要 |
A temperature calculation unit (101) estimates the surface temperature of a slab by a heat transfer model using the operating conditions of a continuous casting machine. A parameter correction unit (102) corrects at least one parameter, included in the heat transfer model, from among thermal conductivity, a heat transfer coefficient between a mold and a solidifying shell, and a heat transfer coefficient of a secondary cooling zone, so that the measured value of the surface temperature of the slab and the estimated value of the surface temperature of the slab match each other. A solidification completion position control unit (103) performs the following: estimates the slab temperature and the solidification completion position of the slab by a heat transfer model using the corrected parameter; calculates an operation amount of a secondary cooling water amount from the deviation from a previously established solidification completion position target value; estimates the slab temperature and solidification completion position by a heat transfer model using a parameter obtained by plugging in a secondary cooling water amount obtained by adding the calculated operation amount to the corrected parameter which is a function of the secondary cooling water amount; and controls the secondary cooling on the basis of the calculated operation amount if a predetermined operating constraint condition is satisfied. |
