Finite Element Analysis On The 3-dimentional Flow Field And Temperature Field In Slab Conticaster Mould

As the heart of slab conticaster, the first step of the molten steel transition to liquid phase is completed. Due to existence of metallurgy phenomenon turbulent flow when molten steel entering into conticaster and solidification when molten steel meets cooling water, heat transfer and fluctuation of bath surface. Continuous casting is a process that liquid metal solidifies and takes shape including complicated phenomenon of fluxion, mass transfer, heat transfer etc. Fluxion and heat transfer of molten steel in conticaster is a very complicated process under high temperature. It is very difficult to measure fluxion and temperature distribution directly in conticaster. Utilizing numerical analysis, especially the finite element method to study flow field and temperature field and to know motion state and heat transfer character of fluid quantitatively is an effective research way. Through analysis and simulation for different parameters, the results provide a certain theories basis to optimize parameters of crystallizer and solve the contradiction between output and safety produce.As the fluxion characteristic of fluid in the crystallizer is not only related with heat transfer of crystallizer, occlusion rising, but also still has a very close relation with surface and internal quality of casting blank. Reasonable distribution of flow field and temperature field is advantageous to shielding slag floating, reduce to be mingled with inclusion, avoid exposing molten steel and insure primary billet shell to grow steadily to prevent the dangerous situation of drawing leaker etc. and protect production and increase outputs effetely. Therefore developing the analysis and research about flow field and temperature field of molten steel in the slab crystallizer is very important.This paper utilizes of finite element software ANSYS FLOTRAN to carry out coupling analysis for flow field and temperature field in crystallizer. 3-dimentional mold is used to flow field, considering the flow of X, Y, Z three directions. Ignore heat transfer of drawing slab direction, consider 2-dimentional temperature mold. Turbulent flow utilizes high-Reynolds number k-e equation to simulate in liquid phase. One of core contents is how to deal with crystal latent heat. In this paper effective capacity method is chosen to process latent source item of phases change.The research object in this paper is a slab conticaster of a domestic Iron and Steel Corporation which stresses to analyze the effect of peed of drawing slab, field angle of water gap, immersion depth of water gap for flow field and temperature field and effect of degree of superheat for temperature field. Through simulation for flow field and temperature field, it analyze the influencing factors of reasonable flow field and temperature field and optimize the model of slab crystallizer, design parameters of SEN and parameters of actual produce.Numerical simulation result fits the site data that can increase output maximally on the basis of promising safety produce and apply effective instrument for actual produce.