An attempt to model electrode change during the ESR process

International Symposium on Liquid Metal Processing & Casting 2015

材料科学;金属工艺学

Karimi-Sibaki, E.^1 ; Kharicha, A.^1,2 ; Wu, M.^1,2 ; Ludwig, A.^2 ; Holzgruber, H.^3 ; Ofner, B.^3 ; Scheriau, A.^3 ; Kubin, M.^3 ; Ramprecht, M.^3

Christian-Doppler Lab for Adv. Process Simulation of Solidification and Melting, Austria^1

Department of Simulation and Modeling of Metallurgical Processes, University of Leoben, Franz-Josef-Str. 18, Leoben

8700, Austria^2

INTECO Special Melting Technologies GmbH, Bruck/Mur

8600, Austria^3

关键词: CFD simulations;    ESR process;    Model electrodes;    Pool profile;    Transient simulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/143/1/012006/pdf
DOI  :  10.1088/1757-899X/143/1/012006

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The electrode change technology is used to produce very large heavy ingots in which a number of electrodes are remelted one after another during the ESR process. Preparing the new electrode for remelting requires a certain period of time when the electric current is stopped (power off). Here, CFD simulation is used to study the behavior of a large scale ESR process during the electrode change (power off). Firstly, the electromagnetic, temperature, and turbulent flow fields in the process before electrode change are modelled. Mold current and thermal effect due to shrinkage of ingot is considered in the model. Then, a transient simulation is performed and the response of the system to the power off is continuously tracked. It is observed that the pool profile of ingot is preserved before and after electrode change. Details of the flow and temperature distributions during electrode change are presented in the paper.