Numerical Simulation Of Copper Continuous Casting Process And Optimization Of Crystallizer Parameters

TP2 copper tube slab is the product of the first process of horizontal continuous casting,and its quality directly affects the performance of TP2 copper tube finished product.As the main body in the continuous casting production,the crystallizer plays a vital role in the production efficiency of the continuous casting or the quality of the casting blank.The modification of the structural parameters of the continuous casting mold directly affects the quality of the casting blank.The purpose of improving the quality of the casting blank can be achieved by optimizing the structural parameters of the crystallizer.The main contents of this article include:Firstly,The 1:1 modeling is performed with crystallizer structure data by the factory was provided,and the hexahedral mesh is used to divide the solid mesh in the finite element ProCAST software,by integrating the Thermal model,the thermoplastic model and the CAFE model,a three-dimensional coupled heat transfer model for the continuous casting process was established,then the model was used to simulate the temperature field,solidification process,thermal stress field and macroscopic field of the casting blank.Secindly,For the first time,the temperature of the crystallizer in the production process was measured,the measured results were compared with the simulated temperature field to verify and check the heat transfer parameters,and the solidification process of the casting blank is simulated by using the checked parameters.The simulation results of thermal stress in various parts of the casting blank were obtained,analyze the law of thermal stress changes in various parts of the casting blank.Thirdly,Changed crystallizer structure parameters,The parameters of the main reforming are the number of the liquid inlet of the crystallizer,the shape of the inlet,the angle of the inlet opening,and the angle of the opening of the non-array side of the inlet.The crystallizer after changing the parameters was numerically simulated to analyze the influence of these structural parameters on the solidification of the casting blank,the thermal stress of the casting blank,and the microstructure of the casting blank,whichprovided a theoretical basis for actual production.Fourthly,The temperature verification was performed on the five sets of factory speeds,Then correction the heat transfer parameters.The five sets of pulling speeds used in the actual production of casting blank were sampled and metallographically experiment.The effects of different casting speeds on the macroscopic field of the casting blank were also analyzed.The macroscopic field of the casting blank was simulated using ProCAST’s CAFE module and compared with the metallographic corrosion results.Verify the accuracy of the simulation.