Furnaces play a crucial role in the metalworking industry, enabling the melting and shaping of various metals.
4 Types of Furnaces Used in Metals
1. Induction Furnaces
Induction furnaces use induction to heat metal to its melting point.
They consist of a tube of water-cooled copper rings surrounding a container of refractory material.
Induction furnaces are commonly used in foundries because they are high-quality and simple to operate.
They can melt a wide range of metals, including iron, steel, copper, aluminum, and precious metals.
2. Crucible Furnaces
Crucible furnaces are simple furnaces made of refractory materials such as ceramic.
They are often used by jewelry makers and hobbyists.
The metal is placed in a crucible, which is then heated in the furnace.
3. Cupola Furnaces
Cupola furnaces are long, chimney-like furnaces filled with coal-coke and additives.
Metal is added directly to the furnace.
While some foundries still use cupola furnaces, they have largely been phased out in favor of induction furnaces due to their improved efficiency.
4. Electric Arc Furnaces
Electric arc furnaces use electrodes to run an electrical current through the metal inside the furnace.
These furnaces are typically used for large slabs, beams, and shredded scrap.
The metal is melted by an arc of electricity passing between the electrodes.
Oxygen may be added to the process.
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