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首页> 外文会议>Ninth international conferece on molten slags, fluxes and salts >The Fluid Mechanics of Slag-Metal Interactions in Ladle Metallurgy
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The Fluid Mechanics of Slag-Metal Interactions in Ladle Metallurgy

机译：钢包冶金中渣-金属相互作用的流体力学

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In Ladle Metallurgy operations following steelmaking, the control of the interactions between slag and metal is crucial for the production of high-quality steel. While the chemical aspects of the refining have been well studied, the fluid dynamic aspects have received less attention. Ladles are often gas-stirred by porous plugs pushing the slag to the periphery of the ladle and opening "eyes" of steel exposed to the atmosphere. The nominal slag-metal contact area is reduced, but there may be entrainment of slag in metal and vice versa which increases the effective interfacial area. Experiments were conducted with water models and the work of others in metallic systems has been included in the study. The eye size has been found to be quite different for thin and thick slag layers, and mathematical models of the controlling factors for the eye size has been determined for these two regimes. The models show that the important factor is the balance between the inertia from the gas-liquid plume and height of the slag, so the governing equations are based on Froude number control. The conditions for closure of the eye have been identified and mathematically modeled. At higher gas flow rate, droplets of slag are entrained into metal which is quantitatively linked to Kelvin-Helmholtz instability. The role that physical properties of the slag play in these phenomena is discussed.
机译：在炼钢后的钢包冶金操作中，控制炉渣与金属之间的相互作用对于生产优质钢至关重要。尽管已经对精炼的化学方面进行了充分的研究，但流体动力学方面的关注较少。钢包通常用多孔塞搅动，这些塞子将炉渣推到钢包的周围，并打开暴露在大气中的钢“眼”。标称的炉渣与金属的接触面积减小了，但是可能夹带了炉渣在金属中，反之亦然，这增加了有效的界面面积。使用水模型进行了实验，研究中还包括了金属系统中其他模型的工作。已经发现，薄渣层和厚渣层的孔眼尺寸完全不同，并且针对这两种情况确定了孔眼尺寸控制因素的数学模型。模型表明，重要的因素是气液羽流的惯性与炉渣高度之间的平衡，因此控制方程基于弗洛德数控制。已经确定了闭眼的条件并对其进行了数学建模。在较高的气体流速下，炉渣液滴被夹带到金属中，金属定量地与开尔文-亥姆霍兹不稳定性相关。讨论了炉渣的物理性质在这些现象中的作用。

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