Clog formation in the submerged entry nozzle (SEN) is a key productivity and quality issue in the continuous casting process for steel alloys. The dominant clogging mechanism has been attributed to the deposition and accumulation of Non-Metallic-Inclusions (NMI), and their initial deposition locations heavily influence the clog geometry and growth. In this study we present a multi-scale approach to model the deposition behaviour of NMIs and their influence on clog formation. A macroscopic transport model for fluid and NMI motion is combined with a microscale model for NMI adhesion. The chosen nozzle geometry is a representative slide gate SEN. After an initial adjustment period for the flow, alumina inclusions are introduced from the top of the nozzle. Various slide gate opening positions and NMI diameters are explored with the corresponding effects on NMI deposition location and rates, which can provide key insights into the clogging phenomena.

Moderated by: Brian Thomas / Laurentiue Nastac