'A METHOD FOR ON-LINE MEASURING OF CLOGGING INDEX IN A SUBMERGED ENTRY NOZZLE IMPLEMENTED IN CONTINUOUS CASTING PROCESS'

摘要

The present invention relates to a method of predicting the clogging index. The clogging index is an indicator of the degree of deposition of non-metallic inclusions inside submerged entry nozzle (SEN) tube, during continuous casting of steel. This invention includes online capturing of stopper position, tundish weight, actual throughput, mould cross-sectional area data from the control system and uses the data to predict the clogging index. The predicted clogging index is then used as decision enabler for inert gas flushing to the casting nozzle, decision of tube and tundish replacement in the casting process.