Merder Tomasz, Pieprzyca Jacek, Warzecha Marek, Warzecha Piotr, Hutny Artur
Faculty of Materials Engineering, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland.
Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, al. Armii Krajowej 19, 42-201 Czestochowa, Poland.
Materials (Basel). 2021 Apr 26;14(9):2229. doi: 10.3390/ma14092229.
Continuous casting is one of the steel production stages, during which the improvement in the metallurgical purity of steel can be additionally affected by removing nonmetallic inclusions (NMIs). This can be achieved by means of various types of flow controllers, installed in the working space of the tundish. The change in the steel flow structure, caused by those flow controllers, should lead to an intensification of NMIs removal from the liquid metal to the slag. Therefore, it is crucial to understand the behavior of nonmetallic inclusions during the flow of liquid steel through the tundish, and particularly during their distribution. The presented paper reports the results of the modeling studies of NMI distribution in liquid steel, flowing through the tundish. CFD modeling methods-using different models and computation variants-were employed in the study. The obtained CFD results were compared with the results of laboratory tests (using a tundish water model). The results of the performed investigations allow us to compare both methods of modeling; the investigated phenomena were microparticle distribution and mass microparticle concentration in the model fluid. The validation of the CFD results verified the analyzed computation variants. The aim of the research was to determine which numerical model is the best for describing the studied phenomenon. This will be used as the first phase of a larger research program which will provide for a comprehensive study of the distribution of NMIs flowing through tundish steel.
连铸是钢铁生产阶段之一，在此阶段，通过去除非金属夹杂物（NMI）可进一步提高钢的冶金纯度。这可通过安装在中间包工作空间中的各种类型的流量控制器来实现。由这些流量控制器引起的钢水流结构变化，应能强化非金属夹杂物从液态金属向熔渣的去除。因此，了解液态钢水流经中间包时非金属夹杂物的行为，尤其是其分布过程，至关重要。本文报道了钢水流经中间包时非金属夹杂物分布的模拟研究结果。研究中采用了计算流体动力学（CFD）建模方法——使用不同模型和计算变量。将获得的CFD结果与实验室测试结果（使用中间包水模型）进行了比较。所进行的研究结果使我们能够比较两种建模方法；所研究的现象是模型流体中的微粒分布和微粒质量浓度。CFD结果的验证证实了所分析的计算变量。该研究的目的是确定哪种数值模型最适合描述所研究的现象。这将作为一个更大研究项目的第一阶段，该项目将全面研究流经中间包钢水的非金属夹杂物分布情况。
