Abstract
The combined movement of steel, slag and gas in a ladle has been studied with the aid of a multiphase CFD model and measurements in production scale. Comparison of model data and measurements in a production ladle has been carried out for three cases: The ‘open eye’ created during gas stirring, the mixing of top slag during gas stirring in the CAS‐OB and finally for studying sculling phenomena. It was found that the simulated ‘open eye’ appears as a central slag‐free zone with a surrounding ‘splash zone’ characterized by the fact that steel is found on top of the slag. The simulated ‘open eye’ corresponds to the ‘splash zone’. The predicted gas stirring in CAS‐OB gives an efficient stirring of the top slag also. This was confirmed by noting that slag samples taken from the ladle seem to be representative of the mean slag composition. Finally, streamlines during stirring have been compared with sculling and wear observed in the production ladle. Good agreement was obtained.
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