Optimum Geometry of the Tundish Upper Nozzle for the Continuous Casting of Steel

摘要

In continuous casting system of the steel, the tundish upper nozzle has an important role onrnthe flow rate control of the molten steel and the elimination of the inclusions and etc. Based onrnthe basic principle of hydrodynamics, the optimal nozzle bore profile was determined withrnaiming to suppress the turbulence with high kinetic energy generated in the molten steel flow.rnThe simulation by flow analysis and water model experiment was performed and clarified thatrnthe turbulence with high kinetic energy could be minimized in the nozzle with newly devisedrninner bore profile. The devised actual nozzle was manufactured and tested in the steel worksrnwith satisfying results. It can contribute to not only improve the durability of the refractories butrnalso stabilize the casting operation by preventing from clogging of the nozzle.