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首页> 外文期刊>ISIJ international >Experimental and Numerical Investigations on Non-metallic Inclusions Distribution in Billets Casted at a Multi-strand Continuous Casting Tundish
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Experimental and Numerical Investigations on Non-metallic Inclusions Distribution in Billets Casted at a Multi-strand Continuous Casting Tundish

机译：多股连铸中间包铸坯中非金属夹杂物分布的实验和数值研究

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Modern tundishes plays an important role of refining treatments to improve the quality and purity of casted steel. Purity of steel is defined by the non-metallic inclusions in the steel product, including their size, quantity, distribution, chemical composition and mineralogy. The aim of presented studies was to investigate the number and distribution of non-metallic inclusion in individual billets casted in a six-strand tundish. The industrial measurements, performed during stable production conditions at the continuous steel casting (CSC) plant, were performed for different tundish working space configurations. Analysis of the size and number of non-metallic inclusions has been done on the metallographic samples using light microscope. Experimental studies were supported with numerical simulations using large eddy simulations (LES) method. A modified boundary condition describing inclusion separation at the liquid steel surface was implemented in commercial code AnsysFluent.Experimental results concern size distribution of inclusions in billets for current tundish configuration showed big differences between casted ingots. Numerical results shown the domination in the number of inclusions occurring in the nozzles number 3 and 4 (for basic tundish configuration) and in the nozzles number 2 and 5 (for tundish with turbulence inhibitor). The reason for that is the change in configuration tundish working space, that has an impact on the flow field inside the tundish. Experimental measurements performed for proposed modified tundish configuration (with turbulence inhibitor) shown that those differences are much smaller, which in consequence has an influence in higher quality of continuously casted ingots for individual strand of CSC.
机译：现代隧道在精炼处理以提高铸钢质量和纯度方面起着重要作用。钢的纯度由钢产品中的非金属夹杂物定义，包括其尺寸，数量，分布，化学成分和矿物学。提出研究的目的是调查以六股中间包浇铸的单个钢坯中非金属夹杂物的数量和分布。在连续浇铸（CSC）工厂的稳定生产条件下进行的工业测量是针对不同的中间包工作空间配置进行的。使用光学显微镜对金相样品进行了非金属夹杂物的尺寸和数量分析。实验研究得到了使用大涡模拟（LES）方法的数值模拟的支持。商业代码AnsysFluent实施了描述钢液表面夹杂物分离的改进边界条件。关于当前中间包配置的坯料中夹杂物尺寸分布的实验结果表明，铸锭之间存在很大差异。数值结果表明，在3号和4号喷嘴（对于基本的中间包配置）和2号和5号喷嘴（对于带有湍流抑制剂的中间包）中出现的夹杂物数量占主导地位。其原因是配置中间包工作空间的变化，这影响了中间包内部的流场。对建议的改良中间包构型（带有湍流抑制剂）进行的实验测量表明，这些差异要小得多，因此，对于CSC的单个钢绞线，连铸锭的更高质量具有影响。

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