五流中间包流场和温度场的模拟研究及优化

Simulation and optimization of flow and temperature fields in five flow tundish

以某钢厂T型五流中间包为研究对象,建立1∶2物理模型和1∶1数学模型,采用物理数值模拟方法对其内部控流装置进行优化,对比分析了不同控流装置下中间包流场、温度场和停留时间分布(RTD曲线)等特征参数。结果表明,在优选的最佳控流装置方案下,中间包平均停留时间延长96 s,死区比例由原型中间包的24.9%降低至13.3%,各流水口均匀性和一致性也显著提高,尤其是远流低温区得到改善,各流出口最大温差控制在0.25 K,可有效提高实际中间包的冶金效果。

T-shaped five-flow tundish of a steel mill is taked as the research object,establishes 1:2 physical model and 1:1 mathematical model,adopts physical numerical simulation method to optimize its internal flow control device,and compares and analyzes the characteristic parameters of flow field,temperature field and residence time distribution(RTD curve)of tundish under different flow control devices.The results show that under the optimal flow control device scheme,the average residence time of tundish is extended by 96 s,the proportion of dead zone is reduced from 24.9%to 13.3%of the prototype tundish,and the uniformity and consistency of each flow outlet were also significantly improved,especially the low temperature zone of the far flow is improved,and the maximum temperature difference of each flow outlet is controlled at O.25 K,which can effectively improve the metallurgical effect of theactual tundish.