Inclusion Removal from Molten Steel Using Electromagnetic Vibrating Force

9th International Symposium on Electromagnetic Processing of Materials

材料科学;物理学

Maruyama, Asuka^1 ; Iwai, Kazuhiko^1

Hokkaido University, Kita 13 Nishi8, Kita-ku, Sapporo, Japan^1

关键词: Channel length;    Frequency ranges;    High frequency HF;    Inclusion removal;    Magnetic field frequency;    Molten steel;    Operating condition;    Simultaneous operation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/424/1/012040/pdf
DOI  :  10.1088/1757-899X/424/1/012040

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

An electromagnetic vibrating force is a candidate of a micro-size inclusion removal method [1-5]. Especially, an A.C. magnetic field imposition has an advantage that it enables the inclusion removal and an induction heating of a molten steel in a tundish simultaneously [3-5]. However, appropriate system design and operating conditions for the simultaneous operation of the inclusion removal and the induction heating of the molten steel by the A.C. magnetic field imposition have not been clarified. Therefore, an inclusion removal time from the molten steel under the A.C. magnetic field imposition has been calculated in this study. And then, a minimum channel length for the inclusion removal and the molten steel temperature increase per unit channel length by the induction heating has been evaluated. The A.C. magnetic field frequency should be controlled within a certain frequency range in which the inclusion removal time becomes minimal. Furthermore, the channel length should be longer than the minimum channel length for the inclusion removal calculated by using the minimum inclusion removal time and an assumed maximum molten steel velocity in the channel. The molten steel temperature increase per unit channel length by the induction heating can be controlled by controlling the A.C. magnetic field frequency within the frequency range suitable for the inclusion removal. Especially, a high frequency condition in that frequency range is better for the efficient thermal supply in this calculation condition.