An Induction Furnace is an electrical furnace in which the heat is applied by induction heating “V: Coreless Induction Furnaces”. Electric Melting Practice. The coreless induction furnace is one of the most important furnace types for cast iron foundries, for the whole non-ferreous industry and for special applications. Topics include furnace components, the sequence of operations for daily start-up, “normal” furnace operation and types of induction furnaces, the differences in.

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The most suitable method for the present work is equivalent circuit method, a second approach is the superposition method, to check the results of the first method in one step of the design. Charge inductance ohm X g: An Induction Furnace is an electrical furnace in which the heat is applied by induction heating of metal. The electromagnetic field attenuates rapidly inside the charge.

Since the designed power supply of this work doesn’t have coteless ability to produce high current, so it was compensated by using a coil of large number of turns of small diameter tube. I JS ER lb Finally; the successful of design and construction of a small induction furnace with limited abilities pushing us to continue in this way to cover what about the building of induction furnaces.


Steel and high temperature alloys

Then, a design, meeting certain specification was prepared, taking into consideration the available facilities. Smelting Bloomery produces sponge iron Blast furnace produces pig iron Cold blast Hot blast Anthracite iron Direct reduced iron.

Retrieved from ” https: This page was last edited on 3 Novemberat Once melted, the eddy currents cause vigorous stirring of the melt, assuring good mixing. Unsourced material may be furance and removed.

Coil impedance ohm Z w: The tube insulated by means of sleeve insulator. The load circuit is a resonant. Crucible inductance ohm X r: The second program is supplemented with a subprogram developed to compute the Bessel functions of the dimensionless constant p and q.

The second program “Equivalent Circuit” is based on the equivalent circuit method, as previously mentioned. Jahanger, is currently pursuing PHD degree in electric. British Electrical Development Association. Ultimately, the furnace was constructed and the final aim, which is melting the metal, was achieved.

Coreless Induction Furnace (CIF) | Calderys

Cross-section view of crucible. Since no arc or combustion is used, the temperature of the material is no higher than required to melt it; this can prevent loss of valuable alloying elements. By using this site, you agree to the Terms of Use and Privacy Policy. The equivalent circuit is shown in fig.


A preheated, one-tonne furnace melting iron can melt cold charge to tapping readiness within an hour.

The coreless induction furnace is considered as the most popular type of the induction furnaces because of its suitability for all metal industries[ 1 ]. The most proper charge metal was tin. From the study of the tables, figures, theoretical calculations and practical results, It can be notice the coinciding or difference between theoretical values and measurement instrument reading in fig.

After that, it was. corelees

The best furnace capacity obtained was mg because of limited facilities available and the lack of step-down transformer and improper workshop. Many measurements were done during furnace operation in order to estimate the performance and also to compare the practical measurements with theoretical calculations, so the accuracy of the furnace is obtained. The variation of magnetic field produces an electric field and eddy currents along paths concentric with the axis.

Coil resistance ohm R w: To fix the turns of coil, an adhesive tape was used, in two layers internal and external.