Analysis And Optimization On The Secondary Cooling System Of Thin Slab Continuous Casting

With the development and application of the technological characteristics in the thin slab casting, the output of the caster and the quality of the slab have became the focus question that people pay close attention to gradually. Secondary cooling is of central importance for the output and the quality in continuous casting process. In order to gain a good quality, the further study on secondary cooling is necessary, and if the secondary cooling system is suitable, it will dig up more productive potentialities.According to the actual situation of Iron and Steel Company in HANDAN, a two-dimensional heat-transfer mathematical model of thin slab in continuous casting has been established in this paper. At the same time, the FEM software ANSYS is successfully applied to simulate the solidification process. In comparison with Spot Date, the reliability of the models is proved. The changing temperature of the slab in the process of solidification can be seen. With the secondary cooling water distributed unreasonably, the temperature difference between X.0 and X.1 is high, cracking of slab happens frequently.The optimization mathematical model is established with the theory of optimization and the metallurgical principle in the secondary cooling process. Combined with the parameters of the continuous casting slab CSP in drawing speed 3.8 m/min, two kinds of optimization methods for optimizing operation are used to analyze and compare water amount. On the premise of meeting the optimization requirements, it needs adjusting the water amount in each cooling part to make sure the slab cooling uniformity effectively and the temperature field is well distributed. In this paper, the optimum cooling water amount in each secondary cooling is studied and the relationship between casting speed and cooling water amount is given by using Least squares algorithm, where the optimization secondary cooling water can be seen.In this paper, the problem of the dump cracking on the transition region in the solidification process of slab has been solved, the reasonable method of secondary cooling system improved is established after vast computation, which provides vital reference foundation and instruction on technology and parameters.