Interaction of Injector Design, Bubble Size, Flow Structure, and Turbulence in Ladle Metallurgy
Interaction of Injector Design, Bubble Size, Flow Structure, and Turbulence in Ladle Metallurgy
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DOI：
10.1002/srin.201800346
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发表时间：
2019-02-01
影响因子：
2.2
通讯作者：
Pfeifer, Herbert
中科院分区：
文献类型：
--
作者：
Owusu, Kwaku B.;Haas, Tim;Pfeifer, Herbert
在钢包冶金中，吹扫气体通过喷射器的流动促进了熔体在成分和能量方面的有效混合。在这项工作中，不同类型的气体喷射器，偏心放置在66%的钢包半径，研究了气泡尺寸分布，合成的流场速度和湍动能。采用粒子图像测速仪(PIV)和图像处理技术，在185t钢包的1：3水模上进行了实验研究。结果表明，与其他喷嘴相比，多孔塞提供了更强的整体对流和更高的湍流程度。这种差异是由于产生了较小的气泡，将更多的动量转移到液体中。不过，喷油器之间的差异很小。因此，与其他工艺参数相比，喷嘴类型对钢包冶炼效率的影响较小。
In ladle metallurgy, the flow of purge gas through injectors promotes an effective mixing of the melt concerning composition and energy. In this work, different types of gas injectors, positioned eccentrically at 66% of the ladle radius are investigated in terms of the bubble size distribution, the resultant flow field velocity, and turbulent kinetic energy. The experiments are carried out in a 1:3 scale water model of a 185 t ladle using Particle Image Velocimetry (PIV) and image processing. It is shown that a porous plug provides more intensive bulk convection and a higher degree of turbulence than the other tested injectors. The differences are explained by the generation of smaller bubbles, which transfer more momentum into the liquid. The differences between the injectors are small, though. Thus, it is concluded that in comparison with other process parameters, the type of injector plays a minor role in the efficiency of ladle metallurgy.