METHOD FOR CORRECTING STEEL TAPPING TEMPERATURE BY MEASURING TEMPERATURE IN LADLE

摘要

PURPOSE:To accurately decide steel tapping temp. and to improve accuracy of temp. control in molten steel by deciding the steel tapping temp. with liquidus temp. based on the components and various temp. dropping conditions and further correcting the assumed temp. drop by measuring temp. of ladle refractory. CONSTITUTION:The steel tapping temp. is once decided with the liquidus temp. based on the components and natural temp. drop during interval from the ladle to a tundish, temp. drop at the time of bubbling, temp. drop in conveying time, temp. drop by adding ferro alloy at the time of the steel tapping, natural temp. drop at the time of the steel tapping, etc. At the time of the above decision, the temp. of the ladle refractory 1 is measured with thermocouples 2, 3 embedded in this. Based on this temp. measured result, the temp. drop caused by heat conduction of the ladle refractory 1 is assumed. In consideration for this temp. drop, the correction is further added to the above decided steel tapping temp. By this method, the steel tapping temp. is accurately decided to accurately control casing temp., and the quality of a continuously cast slab is improved.