Microbubble Swarms in a Full-Scale Water Model Tundish
Microbubble Swarms in a Full-Scale Water Model Tundish
复制标题
DOI：
10.1007/s11663-016-0747-1
复制
发表时间：
2016-10-01
影响因子：
3
通讯作者：
Guthrie, Roderick I. L.
中科院分区：
文献类型：
--
作者：
Chang, Sheng;Cao, Xiangkun;Guthrie, Roderick I. L.
水模型，使用微泡群，在一个全尺寸的，四股，三角形的，位于麦吉尔金属加工中心（MMPC）。本研究的目的是调查的有效性的微泡去除夹杂物小于50 μ m，应用的原则和条件，以前研究使用较小规模的安排。空气被注入到一个钢包长水口（钢水流入下面的钢包的连接管）的全尺寸模型中。钢包长水口模型上安装了十二个激光钻孔，以产生微气泡。使用高速相机记录使用不同气体注入方案产生的气泡，并使用商业软件ImageJ对气泡图像进行后处理。使用这种新设计的钢包长水口，气泡尺寸可以显著减小，平均直径小至675 μ m。一个三维的，CFD模型模拟开发，使用从相应的水模型实验中获得的参数，以预测这些微气泡的行为内的结晶器和它们的潜在影响的流动模式和夹杂物上浮能力。
Water modeling, using microbubble swarms, was performed in a full-scale, four-strand, delta-shaped tundish, located at the McGill Metals Processing Centre (MMPC). The objective of the study was to investigate the effectiveness of microbubbles in removing inclusions smaller than 50 mu m, applying the principles and conditions previously researched using a smaller scale arrangement. Air was injected into a full-scale model of a ladle shroud (the connecting tube through which liquid steel flows into the tundish below). The model ladle shroud was fitted with twelve, laser-drilled orifices, so as to create microbubbles. The bubbles generated using different gas injection protocols were recorded using a high-speed camera, and the bubble images were postprocessed using the commercial software, ImageJ. With this newly designed ladle shroud, bubble sizes could be reduced dramatically, to as small as a 675 A mu m average diameter. A three-dimensional, CFD model simulation was developed, using parameters obtained from the corresponding water model experiments, in order to predict the behavior of these microbubbles within the tundish and their potential influence on flow patterns and inclusion float-out capability.