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An Electric Induction Furnace (EIF) uses electromagnetic induction to melt metals. Instead of burners or resistive heating, it uses alternating current (AC) to generate eddy currents in a metal charge, which heats and melts it from within.
How It Works
An AC current flows through a copper coil surrounding the crucible.
This creates a magnetic field that induces eddy currents in the metal.
These eddy currents generate internal heat, melting the metal.
The magnetic field also stirs the molten metal, improving uniformity.
Key Components
Power supply (inverter with frequency control)
Induction coil (copper tubing with water cooling)
Refractory-lined crucible
Water cooling system (for coil and power electronics)
Control panel (monitors power, temp, time)
Lining (acidic/basic/neutral) - chosen based on the metal being melted