| 摘要 |
PROBLEM TO BE SOLVED: To accurately estimate a final solidification position and a final solidification shape in continuous casting and to control casting on the basis of the estimated results.SOLUTION: A solidification state of the cast slab in continuous casting is estimated by a heat transmission model using a heat flux based on cooling conditions of at least secondary cooling. Temperature distribution in a width direction of the slab is measured by a thermometer 4b at a preset measurement position in a longitudinal direction of the slab, which is a pulling-out direction of the slab. In addition, heat flux distribution in the width direction of the slab of the heat flux is corrected so that an estimated temperature at the measurement position estimated by the heat transmission model and the temperature distribution in the width direction of the slab measured by temperature distribution measurement means coincide. A braking force caused by a magnetic field for a molten steel in a mold is adjusted based on the estimated final solidification shape and a shape in the width direction at a solidification completion position of the slab is controlled so that the difference between the solidification completion position at the most upstream side and the solidification completion position at the most downstream side is shorter than a preset length. |
