六流连铸中间包挡墙参数对流场的影响研究

Numerical and physical simulation on fluid flow of a tundish of six-strand continuous casting

通过数值模拟对六流中间包的三种挡墙及两种不同拉速进行流场和RTD曲线模拟研究,并对最优方案进行了物理模拟,以验证研究结果的准确性。结果表明:在0.5m/min拉速及第三种挡墙下,中间包流场分布最为合理,滞止时间较长有效避免了短路流的产生,死区体积分数较小促进了夹杂物的上浮去除,RTD曲线的一致性较好使得各水口钢材质量均匀稳定。物理模拟验证结果表明,两种模拟方法所得结果高度吻合,试验结果的准确性较高。

The fluid flow and RTD curves of six-strand tundish under three baffles and two different casting speed was studied by numerical simulation,besides the optimum scheme was studied by physical simulation to prove the accuracy of finding of the research. The results of numerical simulation show that when the casting speeding was 0. 5 m/min and used the third baffle,the fluid flow of tundish is the most suitable,longer minimum residence time prevents bypass flow,lesser volume fraction of dead zone promotes flotation of inclusions,the better consistency of RTD curves makes the steel quality of each nozzle uniform and stable. The results of physical simulation indicate that the results of the two simulation methods are highly consistent and the test results have high accuracy.