metal can be melted by magnetic induction, which uses a strong, alternating magnetic field to generate eddy currents within the metal. These currents flow through the metal’s resistance, converting electrical energy into heat (Joule heating), which raises the metal’s temperature to its melting point. If the metal is ferromagnetic, it will also be heated by magnetic hysteresis as its atoms are repeatedly magnetized and demagnetized.
The Process of Melting Metal with Magnetic Induction
1. Inductor Coil:
A strong alternating current is passed through a coil (inductor) surrounding the metal.
2. Alternating Magnetic Field:
This creates a rapidly changing magnetic field that extends into the metal.
3. Eddy Currents:
The fluctuating magnetic field induces circular electrical currents, called eddy currents, within the metal.
4. Joule Heating:
Because metal has electrical resistance, these eddy currents generate heat, similar to how an electric stove heats a pan.
5. Hysteresis (for ferromagnetic materials):
If the metal is ferromagnetic (like iron), its atoms’ magnetic domains are repeatedly aligned and then misaligned by the changing field, releasing energy as heat in a process called hysteresis.
6. Melting:
The rapid and intense build-up of heat from these two effects (Joule heating and hysteresis) eventually raises the metal’s temperature to its melting point, causing it to become molten. see more videos and information on Instagram page
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