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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >Distribution and motion behavior of desulfurizer particles in hot metal with mechanical stirring
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Distribution and motion behavior of desulfurizer particles in hot metal with mechanical stirring

机译：机械搅拌热金属中脱硫颗粒的分布及运动行为

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摘要

To improve the desulfurization efficiency of hot metal with mechanical stirring, the distribution and motion behavior of desulfurizer particles have been investigated by numerical simulation. The volume fraction of desulfurizer particles in different ladle regions and particle trajectory are further discussed. In addition, the effects of rotation speed and eccentricity of impeller have also been elucidated. The results show that the motion of desulfurizer particles in different ladle regions takes about 10s to reach a dynamic steady state. The particle volume fraction in upper circulation region (562%) is about 2.0 times that in middle agitation region (27.7%), and about 3.5 times that in lower circulation region (16.1%). The typical motion trajectories of desulfurizer particles can be summarized into four types. The largest particle volume fraction in upper circulation region is mainly attributed to the first and fourth types of motion trajectories, while the second and third types of trajectories contribute to the particle volume fraction in middle agitation region and lower circulation region respectively. The greater rotational speed is more conducive to desulfurization, however the rotation speed is not recommended to be >90 rpm to avoid the possibility of overflow during actual production process. Compared with the centric stirring, the impeller eccentricity of 100 mm is recommended and more beneficial to desulfurization. (C) 2019 Elsevier B.V. All rights reserved.
机译：为了改善机械搅拌的热金属的脱硫效率，通过数值模拟研究了脱硫剂颗粒的分布和运动行为。进一步讨论了不同钢包区域和颗粒轨迹中脱硫颗粒的体积分数。此外，还阐明了旋转速度和偏心率的影响。结果表明，不同钢包区域中的脱硫颗粒的运动大约需要10秒以达到动态稳态。上循环区（562％）的颗粒体积分数约为中搅拌区域（27.7％）的2.0倍，较低循环区的约3.5倍（16.1％）。脱硫剂颗粒的典型运动轨迹可以概括为四种类型。上循环区域中的最大粒子体积分数主要归因于第一和第四类型的运动轨迹，而第二和第三类型的轨迹分别有助于中搅拌区域和下循环区域中的粒度分数。更大的转速更有利于脱硫，但是不建议旋转速度> 90 rpm，以避免在实际生产过程中溢出的可能性。与中心搅拌相比，建议叶轮偏心100mm，更有利于脱硫。 （c）2019年Elsevier B.V.保留所有权利。

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