| Due to the inclusion in the process of continuous casting, clogging often appears in the nozzle. Clogging mainly be related to aluminum and aluminum oxide in the liquid steel. Clogging of tundish nozzle head and the stopper head often can leads to the nonnormal casting. The lower part of SEN, nodulation grows up, the volume becomes larger after may falls off. No matter inclusions nodulation, or nozzle clogging,they will reduce the production efficiency of the continuous casting machine, affect the quality of casting billet at last.The thesis through inserting a rod to adsorb inclusions in the nozzle, using the FLUENT software to carry out numerical simulation. Study on adsorption rod’s effect on the liquid steel and inclusion. The influence on the liquid steel, mainly through the simulation study of the size and surface shade of the adsorption rod. Through the establishment of the wall surface adsorption model, obtained the inclusion removal rate.Study on the roughness of the adsorption rod, the size of inclusions and adsorption rod,the velocity of the liquid steel, inclusion initial position’s effect on the adsorption rate.Identify the key factors to affecting the adsorption rate.Under the control of the stopper,in the nozzle head, stopper head following areas,the liquid steel will produce vortex, vortex is an important index of inclusions gathering and one of the important reasons that nodulation in the stopper head and the nozzle head.Inserting rod, vortex range reducing, The upper part of the velocity of the liquid steel increase, and velocity increases with the adsorption rod radius increasing. Changing the adsorption rod shape, surface exits pits, the liquid steel will produce vortex in the pits,improve the adsorption efficiency of inclusions. With the experimental conditions, when rod roughness is 5mm, inclusion adsorption rate is the highest, up to the a maximum of19.24%. Adsorption rod radius is 9mm, the adsorption rate is the highest. The closer the initial position of the inclusion and the adsorption rod, the higher the adsorption rate,the maximum value is 42%. |
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