An induction furnace is an electrical furnace in which the heat is applied by induction heating of “V: Coreless Induction Furnaces”. Electric Melting Practice. Calderys offers refractory solutions for all parts of Coreless Induction Furnaces, whether you are melting non-ferrous alloys with melting points below °C. Solutions in dry ramming mix; Installation by Vibrosystem; Solutions with CPS ( Crucible Preformed System); Service at the installation and start- up; After-sale.

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Lower frequencies can generate stirring or turbulence in the metal. Unsourced material may be challenged and removed. Simple charging and pouring, precise control of power. Generally, the smaller the volume of the melts, the higher the frequency of the furnace used; this is due to the skin depth which is a measure of the distance an alternating current can penetrate beneath the surface of a conductor.

A preheated, one-tonne furnace melting iron can melt cold charge to tapping readiness within an hour. Eddy current heating is used for the heat treatment of metals i.

Electrical Engineer’s Reference Book, 16th Ed. The magnetic field induces eddy currentscircular electric currents, inside the metal, by electromagnetic induction. Industrial furnaces Induction heating. In the coreless type, [6] metal is placed in a crucible surrounded by a water-cooled alternating current solenoid coil.


The frequency employed depends upon the size of the coreless induction furnace. Leave this field empty.

Aluminium > Coreless induction furnaces

In other projects Wikimedia Commons. A powerful alternating current flows through the wire.

Bessemer process Open hearth furnace Electric arc furnace Basic oxygen process. Leave a Reply Cancel reply Your email address will not be published. The heat in the material to be heated is produced by eddy currents.

The capacities available vary from 50 Kg to about 20 tones. British Electrical Development Association.

Your email address will not be published. To reduce copper losses, hollow copper tubes are used in which cold water is circulated.

The eddy currents produced in the charge not only heat it up but also account for the stirring action. The material to be heated is placed inside the coil. The operating power factor of such furnaces is very low between 0. Iron laminations are provided outside the primary winding to inducion a low reluctance path for flux and also contain the stray field which may otherwise induce the heavy current in supporting steel structure.

Refractory products for Coreless Induction Furnace

The initial cost is more as furnce to arc furnace. The coreless induction furnace is chiefly used for melting of steel and other ferrous metals.

History of ferrous metallurgy List of steel producers. The rectified voltage is applied to the oscillator and high-frequency output is fed to the charge to be heated through an output transformer.

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Coreless Induction Furnace

The process is economical for continuous heating. Iron and steel production. High-frequency eddy current heating is frequently used for forging and annealing.

This site uses cookies: No core is provided in the coreless induction furnace. Please help corelesa this article by adding citations to reliable sources. This is also known as the induction heating. A crucible of more convenient shape can be employed. By using this site, you agree to the Terms of Use and Privacy Policy.

Electro-slag remelting Vacuum arc remelting Argon oxygen decarburization. The primary is wound over the crucible itself. American Society for Metals.

Annealing Low hydrogen Short circuit. For lower capacities of furnaces higher frequency of the order of Hz are indkction whereas for higher capacities frequencies are down to Hz. The automatic stirring action produced by eddy currents. November Learn how and when to remove this template message. Articles needing additional references from November All articles needing additional references All articles with unsourced statements Articles with unsourced statements from July