ASF方坯八流中间包内钢液流场的模拟研究

以某钢厂的八流连铸中间包为研究对象,采用数值模拟方法对不同控流结构中间包内钢液流场进行了研究,并通过水模型实验和工业生产进行验证。模拟结果表明:ASF中间包内的挡墙和湍流器能够明显改善钢液的流动状态和温度分布,加上双坝后效果更佳,钢液的流动存在4个环流区,不仅增加了钢液的混合程度,而且中间包内钢液的温度分布更均匀且低温区较少。水模试验表明在空包中加入湍流器和挡墙能明显改善各流流动特性的一致性,且在其基础上加入双坝能进一步改善钢液的流动特性,与数值模拟结果一致,此外,工业生产也完全达到预期效果。

Research on simulation of liquid steel flow in a ASF billet 8-strand continuous casting tundish

Three-dimensional flow field of molten steel in a 8-strand continuous casting tundish is investigated by numerical simulation method and then the results are verified by water model experiment and industrial production.The simulation result shows that the baffle and inhibitor in ASF tundish can improve the flow coditions and temperature distribution of liquid steel remarkablely.The flow conditions will be much better if double dams are installed in the tundish.Since there are four circulation zones for flowing of the liquid steel not only mixability of the liquid steell is improved,but also the temperature distribution of the liquid steel in the tundish is more homogeneous and low temperature zone is much less as well.Water model experiments show that the similarity of the flow characteristics of each strand can be prominently improved by installation of inhibitor and baffle in an empty tundish and the flowability of the liquid steel can become much better if double dams are further added in the tundish upon the above mentioned base.The results of numerical simulation are completely in agreement with that of the water modelling.Beside the expected purposes have also been achieved in the industrial production.