METHOD FOR CONTROLLING IN-MOLD MOLTEN STEEL SURFACE LEVEL

摘要

By extracting and removing primary, secondary, and tertiary standing wave components by using one level meter, only the variation of the normalized hot-melt surface to be controlled is extracted and used for controlling the level of the hot-In order to realize the level control, the models 12 and 14 of the fluctuation of the bath surface level by the standing wave oscillating at a specific cycle corresponding to the mold width are expressed by the secondary vibration system, and the level measurement values measured by the bath surface level system, 14 and by outputting at least one of the deviation between the output of the models 12 and 14 and the output of the models 12 and 14 to the output of the obtained models 12 and 14 The level of the tumbling level fluctuation component by the standing wave is estimated and a level signal having a deviation between the level measurement value measured by the bath surface level meter and the output of the models 12 and 14 is taken as a level signal from which the standing wave component is removed, The actuator for regulating the flow rate of molten steel flowing into the mold is operated by the feedback control.;