| 摘要 |
PROBLEM TO BE SOLVED: To contribute to the improvement of the quality of a cast block as the product by estimating the temp. drop in a high accuracy according to the molten metal tapping from a furnace and accurately matching the molten metal temp. at the time of pouring the molten metal into a mold to a suitable temp. SOLUTION: The temp. dropping degree arithmetic part 31 reads the operational conditions from an operational condition file 34 and these operational conditions are applied to a specified arithmetic formula and a specified dropping degreeΔT1 of molten steel temp. after tapping to casting time, is obtd. and given to a dropping degree correcting part 32. The dropping degree correcting part 32 uses the temp. measured value Tcc of the inner wall refractory of a ladle completing the casting and the operational conditions read out from the operational condition file 34, and the dropping degree of the molten steel temp. by heat conduction of the inner wall refractory at the time of tapping is calculated. Further, a time needed to the steel tapping is obtd. by using the operational conditions related to the steel tapping time read out from the operational condition file 34 and the dropping degree of the molten steel temp. by heat radiation during steel tapping is calculated. AΔT1 is corrected with the calculated result and the dropping degreeΔT of the molten steel temp. is obtd. and given to an objective temp. setting part 33 for setting the objective temp. at the time of tapping the molten steel.
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