ABSTRACT

The slag entrapment process under two different initial conditions during the end of casting in tundish is studied. A 3D multiphase mathematical model was developed to simulate the slag entrapment behaviour. The critical slag entrapment time (t_s) and the corresponding critical slag entrapment height (h_cs) were predicted. The results show the h_cs increases, the t_s decreases as the casting speed increases, but their relationships are not linear. The influence of casting speed on the h_cs in the range of 1.25–1.5 m min⁻¹ is higher than other ranges. The h_cs simulated from the steady flow field is higher than that from the static state. When the casting speed is 1.50 m min⁻¹, the difference between the h_cs calculated from two different initial conditions is the largest, reaching 9.83 mm (8.42%). The numerical simulation results are verified by a 1:2 scaled water model.

摘要

研究了中间包浇注结束时两种不同初始条件下的夹渣过程。开发了一个 3D 多相数学模型来模拟熔渣截留行为。预测了临界夹渣时间 ( t _s ) 和相应的临界夹渣高度 ( h _{cs )。}结果表明，随着拉速的增加， h _cs增大，t _s减小，但它们的关系不是线性的。在1.25–1.5 m min ^-1范围内拉速对h _cs的影响高于其他范围。hcs _ _{_}从稳态流场模拟的比从静态高。当拉速为1.50 m min ^-1时，两种不同初始条件下计算的h _{cs差异最大，达到9.83 mm（8.42%）。}数值模拟结果通过1:2水体模型进行验证。