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首页> 外文期刊>ISIJ international >Mathematical Model and Plant Investigation to Characterize Effect of Casting Speed on Thermal and Solidification Behavior of an Industrial Slab Caster
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Mathematical Model and Plant Investigation to Characterize Effect of Casting Speed on Thermal and Solidification Behavior of an Industrial Slab Caster

机译：表征铸造速度对工业板坯连铸机热凝固行为影响的数学模型和装置研究

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摘要

Development of a validated 3D transient mathematical model for modeling the fluid flow and solidification process in an industrial continuous slab caster has been demonstrated. The model couples thermo-fluid aspect of mold and sub-mold region by utilizing a standard Enthalpy-porosity method. Extensive plant level measurements of mold heat fluxes and thermocouples data, breakout shell thickness profile, and macrostructures were carried out to evaluate proper input of heat transfer and other conditions for the model. A suitable validation of the model is established with slab surface temperature and solidified shell thickness profile as measured from a breakout shell in the caster plant. An insight is drawn for an industrial slab caster from the model results analysis for a range of operating parameters of casting speed and SEN submergence depth as employed in the caster. Evolution of a solidified shell thickness profile is simulated. Slab surface temperature mapping is drawn from the model and discussed its variation originating due to fluid flow inside the solidified shell. Casting speed is shown to have a dominant effect as temperature rise of order of 50℃ are observed as it is increased from an average plant value of 1.4 m/min to peak of 1.8 m/min. Similar effect is also reflected in the solidified shell thickness profile as shell thickness gets thinner by an order of 6 mm in the sub-mold region due to increase in casting speed from an average to peak value. The effect of SEN submergence depth is also outlined.
机译：已经证明了开发用于对工业连续板坯连铸机中的流体流动和凝固过程进行建模的经过验证的3D瞬态数学模型的开发。该模型通过使用标准的焓-孔隙率方法将模具和子模具区域的热流体相耦合。进行了模具热通量和热电偶数据的广泛工厂级测量，破裂壳厚度分布以及宏观结构，以评估模型的传热输入和其他条件。用铸坯厂的脱模坯壳测量的板坯表面温度和凝固的坯壳厚度轮廓建立了模型的合适验证。通过对连铸机中采用的一系列铸造速度和SEN浸没深度的运行参数进行模型结果分析，得出了一种工业板坯连铸机的见解。模拟了凝固壳厚度轮廓的演变。从模型得出板坯表面温度图，并讨论了由于凝固壳内部的流体流动引起的板坯温度变化。随着从平均工厂生产值1.4 m / min增加到峰值1.8 m / min观察到温度升高约50℃，铸造速度显示出主要作用。由于铸造速度从平均值增加到峰值，子模具区域中的壳体厚度变薄了约6mm，因此在凝固的壳体厚度轮廓中也反映出类似的效果。还概述了SEN浸没深度的影响。

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