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首页> 外文期刊>ISIJ international >Trickle Flow Behaviors of Liquid Iron and Molten Slag in the Lower Part of Blast Furnace
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Trickle Flow Behaviors of Liquid Iron and Molten Slag in the Lower Part of Blast Furnace

机译：高炉下部铁水和熔渣的ckle流行为

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摘要

In-situ observations of the liquid high carbon iron (HCI) and slag flows in coke bed was carried out by using high temperature X-ray fluoroscopy at 1773 K. Along with the observation, 2-dimensional multiphase computational simulations of the liquid HCI and slag flows in the coke bed was carried out to investigate the effect of the slag on the HCI flow in the coke bed. The liquid HCI cannot pass through the coke bed with the coke diameter of 3–5 mm, however, the HCI can pass through the same size coke bed if the HCI comes into contact with the slag in the coke bed. When the HCI and slag contact each other on the coke surface, the contact angle of the HCI with slag decreases and its wettability increases. On the other hand, the slag’s contact angle increases and it changes to non-wettable phase. Based on the experimental and simulation results, it is confirmed that the contact angle change due to the HCI-slag contact makes them pass though the narrow coke slit which is small enough to prevent both of the liquid phases from flowing down if they do not contact each other. Based on the capillary rise model, the driving force of the HCI penetration into the coke bed will be the energy reduction by extending area of the coke surface covered with the liquid HCI.
机译：通过使用高温X射线荧光透视法在1773 K上对焦炭床中的液态高碳铁（HCI）和炉渣流进行原位观察。进行了焦炭床中的液态HCl和炉渣流动，以研究炉渣对焦炭床中HCl流动的影响。液态HCl不能通过焦炭直径为3-5 mm的焦炭床，但是，如果HCl与焦炭床中的炉渣接触，则HCl可以通过相同尺寸的焦炭床。当HCl和炉渣在焦炭表面上相互接触时，HCl与炉渣的接触角减小，并且其润湿性增加。另一方面，炉渣的接触角增加，并且变为不可湿相。根据实验和模拟结果，可以确定由于HCl渣接触而引起的接触角变化使它们通过狭窄的焦炭狭缝，该狭缝小到足以防止两个液相在不接触时向下流动。彼此。基于毛细管上升模型，HCl渗透到焦炭床中的驱动力将是通过扩展被液态HCl覆盖的焦炭表面的面积来减少的能量。

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