Theoretical and practical study of thermal stratification and drainage in ladles of different geometry

摘要

SSAB Lulea, SSAB Oxelosund, MEFOS and LuleaUniversity of Technology have cooperated in developingtheoretical models for prediction of thermal stratification anddrainage in steel ladles. Predicted results have been verified bymeasurements done in production ladles with heat weighs of 105and 200 tonne as well as in a 7-tonne pilot plant ladle. The thermalstratification was measured by thermocouples at different depths.The drainage flow was studied by means of tracer experiments.Numerical simulation models of the steel flow were developed for7,105 and 200 tonne steel ladles. The agreement betweenpredictions and measurements was found to be good. Theconclusion is that CFD simulation gives a good prediction ofstratification and drainage flows in production ladles.