Mathematical modelling of electroslag remelting P91 hollow ingots process with multi-electrodes
Mathematical modelling of electroslag remelting P91 hollow ingots process with multi-electrodes
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DOI：
10.1179/1743281214y.0000000218
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发表时间：
2014-10
影响因子：
2.1
通讯作者：
F. B. Liu;Z. Jiang;H. B. Li;X. Geng;Xi Chen;H. Feng;X. Zang
中科院分区：
文献类型：
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作者：
F. B. Liu;Z. Jiang;H. B. Li;X. Geng;Xi Chen;H. Feng;X. Zang
T型供电结晶器电渣重熔空心锭工艺是一种新的冶金工艺。建立了描述该过程多物理场相互作用的数学模型，用于研究该过程的工艺。模型采用麦克斯韦方程、Navier-Stokes方程和传热方程，利用有限元软件ANSYS对电磁场、磁驱动流体流动、浮力驱动流动和传热进行了分析。通过对10个电极重熔成Φ900/500 mm空心钢锭的熔池深度测量，验证了该模型的正确性。计算结果与实测结果吻合较好。计算结果表明，由于多电极呈两组对称排列，电流密度、磁感应强度、电磁力、焦耳热、流体流量和温度的分布是对称的，但并不均匀。电渣空心锭过程的模拟将有助于理解新的技术过程和优化操作参数。
Electroslag remelting (ESR) hollow ingot process with T-shape current supplying mould is a new metallurgical technology. A mathematical model was developed to describe the interaction of multiple physical fields of this process for studying the process technology. Maxwell, Navier-Stokes and heat transfer equations have been adopted in the model to analyse the electromagnetic field, magnetic driven fluid flow, buoyancy driven flow and heat transfer using finite element software ANSYS. Moreover, the model has been verified through the metal pool depth measurements, which were obtained during remelting of 10 electrodes into Φ900/500 mm hollow ingots of P91 steel, with a slag composition of 50–60 wt-% CaF2, 10–20 wt-% CaO, 20–30 wt-% Al2O3, ≤8 wt-% SiO2. There was a good agreement between the calculated results and the measured results. The calculated results show that the distribution of current density, magnetic induction intensity, electromagnetic force, Joule heating, fluid flow and temperature are symmetric but not uniform due to the multi-electrode arrangement in two symmetric groups. Simulation of the ESR hollow ingot process will help to understand the new technology process and optimise operating parameters.