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| Optimization of multi-fields coupled molten steel behavior in bloom continuous casting |
| WEN Yan-mei1，HAN Yan-shen1，LIU Qing1，ZHANG Bing-xiang2，ZENG Fan-zheng2，GUAN Min3 |
（1. State Key Laboratory of Advanced Metallurgy， University of Science and Technology Beijing， Beijing 100083， China
2. Technical Center， Xiangtan Iron and Steel Co.， Ltd. of Hunan Valin， Xiangtan 411101， Hunan， China
3. Technical Center， Jiangsu Boji Spraying Systems Co.， Ltd.， Yangzhou 225267， Jiangsu， China） |
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Abstract Numerical simulation combining the finite element method and the finite volume method was employed to study the multi-fields in bloom mold with cross-sectional dimension of 240 mm×240 mm. Firstly， the parameters of submergence depth of the submerged entry nozzle （SEN） and casting speed were optimized by calculating the flow and solidification of molten steel. Secondly， the coupling calculations of magnetic?field and the optimized flow field were performed to optimize the parameters of electromagnetic stirring， such as current intensity and frequency. The simulated magnetic field was in good agreement with the measured data. The results show that the optimized SEN-depth is 100 mm and casting speed is 0.7 m/min. With the electromagnetic stirring， the tangential velocity increases from 0.042 to 0.300 m/s under the condition of casting speed 0.7 m/min and SEN-depth 100 mm， when the current intensity increases from 100 to 400 A. The frequency has little effect on fluid flow. Hence， the optimal flow field can be obtained with 100 mm of SEN-depth， 0.7 m/min of casting speed and 400 A/2 Hz of current.
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Received: 08 November 2017
Published: 20 June 2018
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2018, Vol. 53 
