An induction furnace melts metal by using electromagnetic induction to generate heat. The furnace consists of a coil of wire that creates a magnetic field when an alternating current is passed through it. This magnetic field induces eddy currents in the metal being melted, which in turn generate heat and melt the metal.
The induction melting furnace typically has a conductive coil, usually made of copper, that serves as a pathway for the heat to melt the metal. An electrical current flows through the coil, producing a magnetic field in and around the coil. The energy from the coil transfers to the metal inside the crucible, heating it to its desired melting point. The coil is often cooled with a cooling system to prevent overheating.
There are different types of induction melting furnaces, such as coreless and channel furnaces. In a coreless induction furnace, the coil is the main feature and is used to heat the metal. It offers high control over the metal's temperature and chemistry, as well as even heat distribution.
In a channel induction furnace, there are additional components such as a refractory lined upper case, a lower case for melting or holding power, and a throat that connects the two. The metal loop in the upper case receives power from the induction coil, generating heat and a magnetic field. The metal circulates in the upper case, providing a beneficial stirring action for melting or holding various alloys.
Overall, an induction furnace is more powerful than traditional furnaces because of the increased energy the coil can provide. This makes induction furnaces an essential part of any metal melting process.
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