electric furnace

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electric furnace:

see furnacefurnace,
enclosed space for the burning of fuel. There are many kinds of furnaces, the type depending upon the fuel and the use to which the heat produced within it is put. Most familiar are the furnaces used in the heating of buildings.
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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Electric Furnace


a melting or heating furnace in which the thermal effect of an electrical phenomenon is used.

According to the manner in which electric energy is converted into heat, the following types of electric furnaces are distinguished: arc furnaces, induction furnaces, resistance furnaces, electron-beam furnaces, and equipment for dielectric heating. Depending on the area of application, electric furnaces may be classified as industrial furnaces, laboratory furnaces, or furnaces for comfort heating.

The important characteristics of electric furnaces are the working medium, the type of current or the frequency of the current, and design. The working medium may be air, a corrosive atmosphere, or an inert atmosphere.

Electric furnaces may be used for manufacturing, heat engineering, or electrical engineering purposes. Therefore, one may speak of an electric-furnace installation.

An electric-furnace installation consists of an electric furnace, electric power equipment, auxiliary electrical equipment, switching equipment, instrumentation, pyrometric equipment, and an automatic control system. The electric power equipment includes furnace transformers, rectifiers, high-frequency generators, and tube generators. The auxiliary electrical equipment may include chokes, ballast resistors, capacitors, and plate-supply rectifiers. The switching equipment includes circuit breakers and disconnecting switches. Except for the electric furnace, all the components of an electric furnace installation are concentrated at a furnace power substation.

The size of an electric-furnace installation may be characterized by the installation’s capacity—that is, by its output of materials or finished products—or by the linear size of the furnace’s working chamber and the power rating of the electric power equipment.


Elektrotermicheskoe oborudovanie: Spravochnik. Moscow, 1967.
Egorov, A. V., and A. F. Morzhin. Elektricheskie pechi. Moscow, 1975.
Farnasov, G. A., V. L. Rabinovich, and A. V. Egorov. Elektrooborudovanie i elementy avtomatizatsii elektroplavil’ nykh uslanovok: Spravochnik. Moscow, 1976.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

electric furnace

[i¦lek·trik ′fər·nəs]
A furnace which uses electricity as a source of heat.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Electric furnace

An enclosed space heated by electric power. The furnace may be in such forms as a refractory crucible, a large tiltable refractory basin with a capacity of 100 tons (91 metric tons) and a removable roof, or a long insulated chamber equipped with a continuous conveyor. Heat is provided by an arc to the charge or melt (direct-arc furnace), by an arc between electrodes (indirect-arc furnace), or by an arc confined for concentrated heating by an electromagnetic field (plasma-arc furnace). Heat may also be produced by current flowing in the melt. See Electrometallurgy, Pyrometallurgy

Because the source of heat is nonchemical, electric furnaces are especially desirable in melting alloys of controlled composition. Temperature is also readily controlled. The arc furnace may be used to smelt ores or to refine metals or alloys. Induction furnaces are widely used to melt alloys for castings. Because electric furnaces can be enclosed, they are used for operations that require controlled or inert atmospheres, such as growing crystals or annealing. When sealed and evacuated, they are used in degassing metals. Furnaces with hearth resistors are used for operations below melting temperatures, such as annealing, and with infrared heat lamps, for drying paints or setting glues. See Arc heating, Electric heating, Heat treatment (metallurgy), Kiln, Refractory

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Meanwhile for the tube through which transported the gases of electric furnace with length L, the flow of the thermal energy in its output will be calculated according to equations:
On June 7, Metal Courier cited official sources in the company as saying that the Ashinsky Metallurgical Plant was to put into operation a new electric furnace with a capacity of 1 mn tons annually.
At majority of enterprises electric steel for casting is produced in low-capacity (3-6 t) electric furnaces. All together about 100 arc and induction electric furnaces are installed in steel-melting workshops of machine-building plants.
The principal feature differentiating Kivcet from other flash smelting processes is its copper-jacketed furnace body divided into both a smelting and electric furnace zone including separation of the gas systems.
Silicon carbide manufactured in an electric furnace by heating sand in the presence of carbon is a tough, hard material often used for making sandpaper.
Other distinguishing factors pointed to by the authors as typical of minimills include the scrap-fed electric furnace production process, a product range rather limited in scope and quality, superior productivity, lower wages, and narrower market specialization.
The Osaka-based electric furnace steelmaker is arranging with the creditor banks including the Bank of Tokyo-Mitsubishi UFJ to agree by the end of next month on an out-of-court procedure to rehabilitate its business aimed at reducing debts through talks between the company and creditors, the sources said.
Under the JV the companies will construct a steel mini-mill with electric furnace in Sulaimaniyah in Northern Iraq for a joint investment of between USD100m and USD130m.
It consists of electrolysis cell, resistance electric furnace, DC source, inert gas injection system, evacuation device of the melt salt.
In [1, 2] thermodynamic properties of binary systems nickel-iron, oxygen, silicon, sulfur and phosphorus elements, as well as physical-chemical premises and technology of out-of-furnace (ladle) desulfuration of electric furnace ferronickel by soda are presented.
ELECTRIC FURNACE BUNDLES -- New black steel sheet scrap hydraulically compressed into bundles of size and weight as specified by consumer.