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Electric Induction Furnace

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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
Applications
  • Steel and iron melting (up to 60+ tons)
  • Copper, brass, aluminum
  • Precious metals (gold, silver, platinum)
  • Alloy manufacturing
  • High-precision casting
  • Recycling scrap metal