首页> 外文会议>7th International Conference on Electromagnetic Processing of Materials >The LIMMCAST Program at HZDR:Modelling of Fluid Flow and Transport Phenomena in the Continuous Casting Process
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The LIMMCAST Program at HZDR:Modelling of Fluid Flow and Transport Phenomena in the Continuous Casting Process

机译:HZDR的LIMMCAST程序:连铸过程中的流体流动和传输现象建模

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Model experiments with low melting point liquid metals are an important tool to investigate the flow structure and related transport processes in melt flows relevant for metallurgical applications.We present the new experimental facility LIMMCAST for modelling the continuous casting process of steel using the alloy SnBi at temperatures of 200-400℃.The parameters of the facility and the dimensions of the test sections will be given,and the possibilities for flow investigations in tundish,submerged entry nozzle and mould will be discussed.In addition,the smaller set-up Mini-LIMMCAST will be presented,which works with the room-temperature liquid alloy GaInSn.The main value of cold metal laboratory experiments consists in the capabilities to obtain quantitative flow measurements with a reasonable spatial and temporal resolution.New ultrasonic and electromagnetic techniques for measuring the velocity in liquid metal flows came up during the last decade allowing for a satisfying characterisation of flow quantities in the considered temperature range up to 400℃.First results from LIMMCAST and Mini-LIMMCAST will be presented covering the following phenomena: fully contactless electromagnetic tomography of the flow in the mould,flow monitoring by a multitude of ultrasonic sensors,and analysis of the flow in the mould under the influence of an electromagnetic brake: intensification of the flow turbulence contrary to the expected flow damping,injection of argon bubbles through the stopper rod: occurrence of pressure oscillations.
机译:低熔点液态金属的模型实验是研究与冶金应用相关的熔体流动的流动结构和相关运输过程的重要工具。我们提供了新的实验设备LIMMCAST,用于在温度下使用SnBi合金对钢的连续铸造过程进行建模200-400℃。将给出设备的参数和测试部分的尺寸,并讨论在中间包,浸入式喷嘴和模具中进行流动研究的可能性。此外,较小的Mini-将展示与室温液态合金GaInSn配合使用的LIMMCAST。冷金属实验室实验的主要价值在于能够以合理的时空分辨率获得定量的流量测量值。采用新的超声波和电磁技术测量速度在过去十年中,液态金属的流量增加了在考虑的最高温度范围(400℃)内进行流量分析。LIMMCAST和Mini-LIMMCAST的首批结果将涵盖以下现象:模具中流体的完全非接触式电磁层析成像,通过多个超声波传感器进行的流量监测,电磁制动器影响下模具中的流动的分析;流动湍流的增强与预期的流动阻尼相反;通过塞杆注入氩气气泡:压力振荡的发生。

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