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MATHEMATICAL-MODELING OF SINGLE ROLL CONTINUOUS STEEL STRIP CASTER BASED ON FLUID-FLOW AND HEAT-TRANSFER CONSIDERATIONS

机译:基于流动和传热考虑的单辊连续钢带履带的数学建模

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摘要

The Single Roll Continuous Strip Casting Process has been quantitatively analysed using a mathematical model based on fluid flow and heat transfer considerations. The process is divided into four distinct zones: (1) liquid metal reservoir, (2) liquid metal pool, (3) solid strip zone, and (4) caster drum. Model equations are formulated using a control volume approach and setting up equations representing balances of mass, momentum and energy for these various zones. These equations, which are coupled by the thermophysical properties and various interfaces, are solved using an iterative finite difference technique. It has been possible to simulate the process and predict the effect of various process parameters on the process performance using the model. The parameters examined include: (1) liquid steel head in the tundish, (2) speed of rotation of the caster drum, (3) superheat of melt in the tundish, (4) gap between the caster drum and the tundish, (5) cooling conditions prevailing at the inner surface of the drum, (6) drum geometry, and (7) drum material. While the speed of rotation of the caster drum and the physical dimensions of the liquid metal pool affect the process strongly, the cooling conditions prevailing at the inner surface of the drum only marginally affect the process as far as the final strip thickness is concerned. These, however, along with the drum material affect the temperature distribution in the drum which may have a direct bearing on the microstructure of the product.
机译:基于流体流动和传热的考虑,已经使用数学模型对单辊连续带钢连铸工艺进行了定量分析。该过程分为四个不同的区域:(1)液态金属容器,(2)液态金属池,(3)固态带区和(4)脚轮鼓。使用控制体积方法并建立代表这些不同区域的质量,动量和能量平衡的方程式来公式化模型方程式。这些方程由热物理性质和各种界面耦合,使用迭代有限差分技术求解。使用该模型可以模拟过程并预测各种过程参数对过程性能的影响。检查的参数包括:(1)中间包中的液态钢头,(2)脚轮转鼓的转速,(3)中间包中的熔融物过热,(4)脚轮转鼓和中间包之间的间隙,(5 )感光鼓内表面的冷却条件,(6)感光鼓几何形状和(7)感光鼓材料。连铸机滚筒的旋转速度和液态金属熔池的物理尺寸会极大地影响工艺,但就最终带材的厚度而言,在滚筒内表面普遍存在的冷却条件仅会对工艺产生少许影响。然而,这些与鼓材料一起影响鼓中的温度分布,这可能直接影响产品的微观结构。

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  • 作者

    MALLIK, RK; MEHROTRA, SP;

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  • 年度 1993
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  • 原文格式 PDF
  • 正文语种 en
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