Numerical simulation and experimental study of thermal resistance of continuous casting mold flux
Quantification of mould flux thermal resistance is important for improving the level of continuous casting process and billet quality.In this paper,the thermal resistance of typical continuous casting mould flux is studied by two methods:numerical simulation and heat transfer experiment.First of all,use ANSYS numerical simulation software to establish the billet through the slag channel to the mould thermal conductivity and radiation coupling heat transfer model,to obtain the temperature distribution of the interface on both sides of the slag channel;subsequent modeling of the thermal resistance calculation of the mould flux,the results of the simulated heat transfer were used to evaluate the thickness,conduction thermal resistance and radiation thermal resistance of the solid and liquid mould flux;At the same time,the construction of continuous casting mold flux steady state heat transfer experiment,through the water-cooled copper probe experiment to measure the temperature distribution of the two sides of the mould flux,and then get the comprehensive thermal resistance of different thickness of the slag channel.Numerical simulation results show that when the surface temperature of billet decreases from 1 415℃ to 1 345 ℃,the liquid mould flux in the upper part of the mould is rapidly thinned from 1.7 mm to 1.04mm,and the total simulated thermal resistance along the direction of billeting is increased from 0.67 × 10-3 m2·K/W to 1.46 × 10-3 m2·K/W.Thermal resistance experiments results show that the integrated thermal resistance obtained from the experiments is smaller than the numerical simulation,and the integrated thermal resistance of the slag channel increases with the increase of the thickness,and the typical value of the thermal resistance is(2.28～7.89)× 10-4m2·K/W.
万方数据
维普
