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Optimization of Induction Heating for Container-Less Melt Extraction from a Metallic Sheet

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Abstract

This work examines the induction heating of a metal sheet to be used for multiple instance melt extraction from the lower edge. The task formulation of heating the edge in first place while keeping the release of Joule heat along that edge as homogeneous as possible, i.e., the avoidance of end effects, is solved numerically with a parametric study. A set of factors is also modeled physically in the framework of an experimental series. Subject to variation are (1) the extension of the copper block, which simulates the extraction wheel, in both directions parallel and perpendicular to the inductor; (2) the protrusion depth of the edge of the sheet below the lower face of the inductor; and (3) the shape of the inductor. It is shown that this shape adopted from the floating zone crystal growth technique in a previous work,[1] albeit acting effectively, is removed from optimum. In this article, a more efficient solution is proposed. The numerical simulations also suggest that the vertical position of the inductor must be significantly above that one in Reference 1 to increase the efficiency of the process. Reasonable conformity may be stated between the calculated and the experimental results.

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Notes

  1. Albeit this supposition often does not hold,[2] it should be allowed here for the contemplation of a tendency.

  2. Note in this respect that we are concerned with alternating current of high frequency. To pass the same current through the circular and wedge-shaped inductor in Figure 14, different electrical power is consumed because of the differing impedance of both systems.

References

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Acknowledgment

Financial support from Deutsche Forschungsgemeinschaft in the framework of the Collaborative Research Centre SFB 609 is acknowledged gratefully.

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Author notes

  1. Jong-Soo Park (Research Fellow, Researcher)

    Present address: POSCO Technical Research Laboratories, Process Solutions Research Group, Pohang, Korea

Authors and Affiliations

  1. Department of Magnetohydrodynamics, Forschungszentrum Dresden-Rossendorf, 01314, Dresden, Germany

    Jong-Soo Park (Research Fellow, Researcher), Josef Pal (Senior Research Scientist), Andreas Cramer (Group Leader) & Gunter Gerbeth (Department Head)

Authors
  1. Jong-Soo Park
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  2. Josef Pal
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  3. Andreas Cramer
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  4. Gunter Gerbeth
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Corresponding author

Correspondence to Andreas Cramer.

Additional information

Manuscript submitted March 30, 2010.

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Park, JS., Pal, J., Cramer, A. et al. Optimization of Induction Heating for Container-Less Melt Extraction from a Metallic Sheet. Metall Mater Trans B 41, 1074–1083 (2010). https://doi.org/10.1007/s11663-010-9396-y

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  • DOI: https://doi.org/10.1007/s11663-010-9396-y

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