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Additional recommended knowledge
Operating frequencies range from mains frequency (50 or 60 Hz) to 10 kHz, usually depending on the material being melted, the capacity of the furnace and the melting speed required - a higher frequency furnace is usually faster to melt a charge. Lower frequencies generate more turbulence in the metal, reducing the power that can be applied to the melt.
A preheated 1-tonne furnace melting iron can melt cold charge to tapping readiness within an hour.
An operating induction furnace usually emits a hum or whine (due to magnetostriction), the pitch of which can be used by operators to identify whether the furnace is operating correctly, or at what power level.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Induction_furnace". A list of authors is available in Wikipedia.|