Effects of Submerged Entry Nozzle Parameters on Fluid Flow, Heat Transfer, and Solidification in High-Speed Continuous Casting Slab Mold
摘要
High-speed continuous casting enhances production efficiency, conserves energy, and minimizes emissions. However, increasing the casting speed will change the flow field and heat transfer inside the mold. At the same time, different submerged entry nozzle (SEN) parameters also have a direct impact on the flow field inside the mold. Therefore, it is essential to examine how various SEN structures and processes affect the mold’s flow and temperature fields when casting at high speeds. The results show that casting speed significantly affects the slab’s surface temperature and solidified shell thickness. For every 0.1 m/min increase in casting speed, the wide surface’s average temperature rises by 10.75 K, and the average thickness of the solidified shell on the wide surface decreases by 0.575 mm. Meanwhile, the narrow surface’s average temperature increases by 7.75 K, with the solidified shell’s average thickness on the narrow surface reducing by 0.525 mm. The influence of SEN inner diameter on the surface temperature and solidified shell thickness of the slab is minimal. For every 10 mm change in inner diameter, the average temperature change of the slab’s wide surface is 2.7 K, and the average thickness change of the solidified shell is 0.2 mm. Meanwhile, the average temperature change of the narrow surface is 1.9 K, and the average thickness change of the solidified shell is 0.6 mm. The SEN’s outlet angle substantially impacts the fluctuation and flow velocity of the steel–slag interface. When the outlet angle increases from − 15 to − 25 deg, the amplitude average change rate of the interface is 69.23 pct, and the average change rate of the interface flow velocity is 41.67 pct.