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针对八流小方坯连铸T形中间包,利用钢水流动、传热、传质的三维数学模型对其控流方案进行优化设计,对比分析不同控制装置下的钢水流场、温度场和停留时间分布(RTD)特征。研究结果表明:无控流装置时,中间包内存在短路流,死区较大,流动很不均衡,近流与远流的钢水停留时间和温度都相差较大;现用控流方案消除了短路流,减小了死区,但流动均衡性基本没有得到改善;优化方案比现用方案有了进一步的改善,各流停留时间相近,温差大幅减小,流动均衡性大大改善。
According to the three-dimensional mathematical model of flow, heat transfer and mass transfer of molten steel, the flow control scheme of eight-strand billet continuous casting T-tundish was optimized and the flow field, temperature field and stay of molten steel under different control devices were compared and analyzed Time Distribution (RTD) Features. The results show that there is a short-circuit flow in the tundish when there is no flow control device, the dead zone is large and the flow is very unbalanced, and the residence time and temperature of molten steel in the near-flow and far-flow are quite different. The current flow control scheme eliminates Short-circuit flow and reduced dead zone, but the flow balance basically has not been improved. The optimization scheme has been further improved than the current scheme, the residence time of each flow is similar, the temperature difference is greatly reduced, and the flow balance is greatly improved.