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首页> 外文会议>Pacific Rim International Congress on Advanced Materials and Processing >FORMATION OF FREE SURFACE VORTEX IN THE STEELMAKING PROCESS (DUAL TAPPING HOLE SYSTEM IN A CONVERTER)
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FORMATION OF FREE SURFACE VORTEX IN THE STEELMAKING PROCESS (DUAL TAPPING HOLE SYSTEM IN A CONVERTER)

机译：在炼钢过程中形成自由表面涡流（转换器中双攻洞系统）

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摘要

During the tapping after BOF, slag may carry over due to the formation of free surface vortex. It should be avoided because it would result in not only severe deterioration of the quality of steel but also considerable losses in productivity. In this study, dual tapping hole system is suggested to prevent the vortex formation near tapping hole. Water model experiments and numerical simulation are conducted in order to test feasibility of the dual tapping hole system. Both water model experiments and numerical simulation should similar tendencies that the dual tapping hole system is promising to prevent the vortex formation. Experimental results showed that the free surface vortex formation is highly related to the initial conditions such as tangential velocity, size of the tapping nozzle and shape or configuration of the nozzle. Also by simulation, flow characteristics are checked. Vortex canceling effect between nozzles is observed. Since free surface vortex is rotating phenomena, this effect decreases the vorticity and results in suppressing the vortex. Also, there is a critical value of tangential velocity to generate a free surface vortex and critical height according to the nozzle size and type.
机译：在敲击BOF之后，由于自由表面涡流的形成，炉渣可能携带。应该避免它，因为它不仅会导致钢材质量的严重恶化，而且产生的生产率相当大的损失。在本研究中，建议双攻洞系统以防止敲击孔附近的涡流形成。进行水模型实验和数值模拟，以便测试双攻洞系统的可行性。水模型实验和数值模拟都应该类似的趋势，即双攻孔系统有希望防止涡流形成。实验结果表明，自由表面涡旋形成与诸如切向速度，挖掘喷嘴的尺寸和喷嘴的形状或构造的初始条件高度相关。同样通过模拟，检查流动特性。观察到喷嘴之间的涡流取消效果。由于自由表面涡旋是旋转现象，因此这种效果降低了涡流并导致抑制涡流。而且，根据喷嘴尺寸和类型，存在切向速度的临界值，以产生自由表面涡流和临界高度。

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