Abstract

The fluid flow pattern in the continuous casting mold has a major impact on the final product quality. It transports non-metallic inclusions and argon bubbles to either the top slag layer, where they will be entrapped, or the solidification front, where they will become defects. Moreover, excessive surface level fluctuations and high meniscus velocities may cause mold slag entrapment, deeper oscillation marks and other defects. The flow pattern could also affect the liquid slag penetration in the gap and have impact on the longitudinal cracks index. One of the best ways to control the mold flow pattern and obtain high quality steel is through an optimal Submerged Entry Nozzle (SEN) design. In this work, the flow patterns for different SEN designs were evaluated through numerical simulations. The obtained flow fields were analyzed with focus on the prevention of defects in the final product. Through these studies, it was possible to understand how changes in the SEN design affect the mold flow pattern, and consequently, the steel quality.