Numerical Simulation Of The 3-Dimensional Flow Field And Temperature Field Of CSP Thin Slab Continuous Casting Mold

By the process of continuous casting, the fluid flow in the mold has a great influence upon not only heat transfer and inclusions floatation, but also with many surface and internal quality problems such as crack, segregation etc. Thereby, the numerical simulation of the fluid flow and heat transfer is of utmost importance for improving the thin slab continuous casting production.In this study, a 3-dimensional mathematical model has been developed for the coupled analysis of fluid flow and heat transfer in the funnel shaped mold by using the commercial code PHOENICS. The main aim is to analyze the influences of the configuration of nozzle, immersed depth and the casting speed on the flow and temperature field in the mold. A detailed analysis has been made on cow-nose nozzle which is recommendatory and three-hole nozzle that can increase flux.In comparison with bugle shaped nozzle, bifurcated nozzle downward jet angle 45°, cow-nose nozzle and three-hole nozzle, in all, the last two are better than the former and bifurcated nozzle downward jet angle 45 is better than bugle shaped nozzle; Cow-nose nozzle is helpful for guaranteeing the product's quality, in order to protect jet flow from eroding the strand at narrow face, gain uniform temperature distribution at cross section and decrease heat flux, adding the block's width to 100 mm. Three-hole nozzle is advantageous to increase flux and casting speed, but should avoid weak shell thickness in the center broad. In the real production, setting the SEN's immersed depth or plugging the hole at the bottom can adjust the flow and temperature distribution in the mold.To guarantee the strand quality, the casting speed ought not to exceed 6 m/min. Under the certain configuration of nozzle, it's immersed depth should increase with the increment of casting speed. For example, when the casting speed is 4.0 m/min, the immersed depth of cow-nose nozzle is 250 mm or so, and three-hole nozzle is 280 mm or so.The numerical simulation fits well to the water experiment in literatures and the site data, and the results put an important foundation for further optimization of SEN and proper operating parameters.