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An electric heater is an electrical device that converts an electric current into heat. [1] The heating element inside every electric heater is an electrical resistor , and works on the principle of Joule heating : an electric current passing through a resistor will convert that electrical energy into heat energy.
An electric arc furnace (the large cylinder) being tapped Rendering of exterior and interior of an electric arc furnace. An electric arc furnace (EAF) is a furnace that heats material by means of an electric arc. Industrial arc furnaces range in size from small units of approximately one-tonne capacity (used in foundries for producing cast iron ...
The indirect arc electric furnace of the Stassano type, in its final configuration, is made from a cast iron cylindrical structure lined internally with refractory bricks. The structure is divided in two separate sections: an upper section where the electrodes are placed, and a lower crucible where the burden is loaded and fused into steel.
Induction furnaces do not require an arc, as in an electric arc furnace, or combustion, as in a blast furnace. As a result, the temperature of the charge (the material entered into the furnace for heating, not to be confused with electric charge) is no higher than required to melt it; this can prevent the loss of valuable alloying elements. [5]
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An electric furnace; A central heating plant for a home or building; An electric arc furnace used for steel making and smelting of certain ores; An industrial heat treating furnace; An electrically heated kiln; An induction furnace used for preparation of special alloys; A modern muffle furnace
Furnaces are mostly used as a major component of a central heating system. Furnaces are permanently installed to provide heat to an interior space through intermediary fluid movement, which may be air, steam, or hot water. Heating appliances that use steam or hot water as the fluid are normally referred to as a residential steam boilers or ...
A tube furnace is an electric heating device used to conduct syntheses and purifications of inorganic compounds and occasionally in organic synthesis. One possible design consists of a cylindrical cavity surrounded by heating coils that are embedded in a thermally insulating matrix.