The improvement of mixing conditions in vacuum refining unit plays an important role in enhancing the purity and decarburization of molten steel. A numerical simulation is established to calculate the transport and mixing process of tracers in a water model of Single‐Snorkel Refining Furnace. The results show that the transport process of tracer in water model consists of one main circulation stream (inside the ladle and the vacuum chamber) and two side circulation streams (inside the ladle). The injection of KCl tracer can enhance the downward stream velocity and the stream deviates to the axial center of the ladle. After a while (about 30 s), the downward stream gradually returns to the state when the tracer is not injected. The difference between the transport process of pure water tracer and KCl solution tracer is that the KCl solution tracer flows downward at a higher pace from the vacuum chamber to the bottom of the ladle and later disperses rapidly from the bottom to the nozzle‐located side wall of the ladle. The upward transport process of KCl tracer is slowed down due to the existence of “dead zone” at the bottom of the nozzle‐located side wall of the ladle.

中文翻译：

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单浮潜式精炼炉水模型中示踪剂传输过程的数值模拟

真空精炼装置中混合条件的改善对提高钢水的纯度和脱碳起着重要的作用。建立了数值模拟，以计算单通气管精炼炉水模型中示踪剂的传输和混合过程。结果表明，示踪剂在水模型中的运输过程由一个主循环流（钢包和真空室内部）和两个侧循环流（钢包内部）组成。氯化钾示踪剂的注入可以提高向下的流速度，并且流偏向钢包的轴向中心。一段时间（约30 s）后，下行流逐渐返回到未注入示踪剂的状态。纯水示踪剂和KCl溶液示踪剂的输送过程之间的区别在于，KCl溶液示踪剂以较高的速度从真空室向下流到钢包底部，然后从底部快速分散到喷嘴位置的侧壁钢包。由于钢包的喷嘴位置侧壁的底部存在“死区”，因此KCl示踪剂的向上传输过程变慢了。