底吹钢包内气／钢液／渣三相流模型及渣层行为的研究
MODELING OF THREE-PHASE （GAS/MOLTEN STEEL/ SLAG） FLOWS AND SLAG LAYER BEHAVIOR IN AN ARGON GAS STIRRED LADLE
查看参考文献12篇
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文摘
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建立了底吹钢包内气／钢液／渣三相流动数学模型，利用多相流动体积法（VOF）模拟了渣层运动行为．模型结果再现了底吹钢包内气／钢液／渣三相流动现象。当Ar气被吹进钢包时，在钢液内产生气泡，上升的气泡间歇地冲击并突破渣层，产生渣眼；同时，渣层发生波动，波动频率随着Ar气流量的增加而增加．参数研究显示：220t钢包底吹流量由100增加到300L／min，渣眼直径由0．43增加到0．81m。计算的无量纲渣眼面积与文献中渣眼的实验结果很接近。Ar气喷吹期间，渣层发生重大的变形，近渣眼处的渣层变薄，近钢包壁处的渣层变厚．渣眼周围钢液流速很大，并导致部分渣滴卷入钢液中。 |
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其他语种文摘
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A mathematical model was developed to analyze the transient three-dimensional and three-phase flow in an argon gas bottom stirring ladle with one porous plug. Multiphase volume of fluid （VOF） method was used to simulate the kinetic behaviors of slag layer. Numerical results make the transient phenomena recur： when argon gas is injected into molten steel in a ladle, gas rising passage is formed near the plug, and then bubbles are created in the interior of molten steel; the rising gas bubbles impinge the slag intermittently and breakthrough the slag layer to create the slag eye. Simultaneously, the wave at interface of slag steel formed and wave frequency increases with the increase of argon gas flow rate for one off-centered plug case. Parametric studies show that the diameter of slag eye changes from 0.43 to 0.81 m while the argon gas flow rate increases from 100 to 300 L/min for a 220 t ladle. The dimensionless areas of slag eye vs the modified Froude number is close to the experimental data in literature. Significant deformation of slag layer occurs during gas stirring operation, the thickness of slag becomes thin near the slag eye and thick near the ladle wall accordingly. The steel downward flow velocity at the slag eye periphery can be affected significantly by Ar gas flow rate. The higher the velocity, the more slag could be emulsified. |
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来源
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金属学报
,2008,44(10):1198-1202 【核心库】
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关键词
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钢包
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渣层运动行为
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三相流
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数学模型
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地址
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1.
东北大学材料与冶金学院, 辽宁, 沈阳, 110004
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安徽工业大学冶金与资源学院, 马鞍山, 243000
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School of Mechanical Engineering, USA
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0412-1961 |
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学科
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冶金工业 |
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基金
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国家自然科学基金委员会-上海宝钢集团公司“钢铁联合研究基金”
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文献收藏号
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CSCD:3420302
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