Arc furnace transformers are used for melting scrap metal. Usually in combination with an arc furnace, there is a ladle furnace The ladle furnace is used in the process of refining the metal melted by the arc furnace. Arc furnace transformers are normally designed as three phase units.Reduction furnace transformers are mainly used in the metallurgical industry. Production of ferro- alloys is an important application. The major alloys are ferro-silicon, silicon metal and ferro- manganese. Other significant alloys are ferro-nickel and ferro-chrome. Reduction furnaces are also used in the production of non ferrous metals such as copper, nickel, tin, lead and zinc. Reduction furnaces are also used in the production of calcium carbide. The most common design for reduction furnace transformers is single phase.Examples on furnace transformers for special purposes can be for production of electrode material and electro slag refining, where the latter is production of very high quality steel.
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