SIMULATION OF COOLING CONDITIONS IN SECONDARY COOLING ZONES IN CONTINUOUS-CASTING PROCESS

To simulate the cooling conditions between a pair of rolls in the seco ndary cooling zones, a one-dimensional mathematical model has been dev eloped. This model calculates the surface temperature profiles and tem perature distributions in the solidified shell and the mushy zone of c ontinuously cast slab. The model has been used to inversely evaluate t he Newtonian heat transfer coefficient from available measured surface temperatures. The influence of direct and indirect factors on the hea t transfer coefficient has been extensively discussed. To verify the a ccuracy, model simulations have been compared with measured surface te mperatures of a certain cooling zone, and good agreements obtained. Th e results indicate that the direct factors such as different cooling c onditions have a significant effect on the heat transfer coefficient b etween a pair of rolls. Furthermore, the model demonstrates the influe nce of various water flowrates on the surface temperature profile of t he upper side of the slab.