The influence of the selected parameters of the mathematical model of steel continuous casting on the distribution of the solidifying strand temperature

This paper presents the results of the numerical calculations concerning the influence of the placing of the developing gaseous gap in a mould based on the thickness of the forming shell, and the temperature distribution on the strand length. A cast slab with dimensions of 1100 mm x 220 mm was analysed. The calculations were performed on various heights of the formation of the gap in the mould. Other process parameters, i.e. the casting speed, melt temperature, and the cooling intensity in the secondary cooling zone, were maintained at a constant level. The numerical model of the steel continuous casting process, developed with the ProCAST software was used. In the study the effect of the height of the air gap development was examined for five variants. In the heat transfer in the gap model, two basic heat transfer mechanisms were assumed: by radiation and by conductivity. The numerical model of the steel continuous casting process with influence of the placing of the developing gaseous gap in a mould was developed. The verification of the calculation results obtained, after conducting a number or mathematical simulations, concerned the shell thickness and its dependence on the height of the air gap. The simulation of the temperature distribution was made for the whole strand.