DETECTION OF MOLTEN STEEL BIASED FLOW IN MOLD OF CONTINUOUS CASTING

摘要

PURPOSE:To prevent the bad quality of a casting slab by arranging each two sets of vortex-type levelers as each position between a submerged nozzle and each short-side of a mold at both the ends of the nozzle and detecting a biased flow of molten steel delivery flow in the mold in accordance with the deviation of level. CONSTITUTION:If the biased flow is developed to incline toward the delivery hole 5 side at the right direction, the molten steel flow 6 increases the flowing speed, that is, the reversed flow is strengthened, to develop an uplift A on the molten steel surface by the ascendant flow 6. This uplift surface A is detected as change of the level by a detecting head (vortex type leveler) 7 to get the deviation in comparison with the level value detected by the detecting head (vortex type leveler) 8 at the other position. Therefore, by arranging an alarm at the time of developing of the deviation or exceeding of the permissible value for the quality, the continuous casting operation is obtd. to reflection, so that entrainment of the flux or the bad internal quality, by which the descendent flow reaches to deep inner part of the casting slab, are prevented.