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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Steel and high temperature alloys

An iron mold was designed and constructed, consisting of three parts; a male, female to demarcate the shape of the crucible, and pusher to inductikn the fireclay within the mold between the first two parts.

An operating induction furnace usually emits a hum or whine due to fluctuating magnetic forces and magnetostrictionthe pitch of which can be used by operators to identify whether the corwless is operating correctly or at what power level.

When the coil is excited by an alternating current it produce an axial alternating magnetic field. Vikas Publishing House Pvt. The furnace efficiency Table 3: This method is the main design technique used in this work. This material voreless very acceptable thermal, mechanical, metallurgical qualities for the task, also there is available experience in handling this material.

The coil creates a rapidly reversing magnetic field that penetrates the metal. Generally, the smaller the volume of the melts, the higher the frequency ihduction 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. The electromagnetic field attenuates rapidly inside the charge.

The induction furnace is, therefore, based on four principles: Bloomery produces sponge iron Blast furnace produces pig iron Cold blast Hot blast Anthracite iron Direct reduced iron. Coil resistance ohm R w: In accordance with the theoretical basis, three programs were developed, the first program “Required Power” calculates the required power by the charge to be melt and also calculates the thermal efficiency.

Jahanger, is currently pursuing PHD degree in electric. The required number of amper-turns to melt the charge practically measured and theoretically calculatedis illustrated in table 3.

British Electrical Development Association. Cross-section view of obtained crucible is shown in fig. The tube insulated by means of sleeve insulator. The mold and its cross- section view are shown in fig.

A variety of the metal were studied to choose the charge. American Society for Metals. The coreless induction furnace is considered as the most popular type of the induction furnaces because of its suitability for all metal industries[ 1 ]. 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.

Coreless Induction Furnace (CIF) | Calderys

Part of the developed heat is lost to the surrounding medium, and the remaining part is distributed through the mass of the charge by effect of thermal conductivity[ 3 ]. The material used to construct the crucible was fireclay. Articles needing additional references from November All articles needing additional references All articles with unsourced statements Articles with unsourced statements from July Induction Furnace “, M.

History of ferrous metallurgy List of steel producers. The equivalent circuit method are general methods that can be applied to analysis and design of all induction indkction applications, the coreless furnace is certainly one of them.

Since the designed power supply of this work doesn’t have the ability to produce high current, so it was compensated by using a coil of large number of turns of small diameter tube. The required power consists of: The physical inducrion of the workpiece and its dimension determine the frequency of the power supply for heat process.

Ultimately, the furnace was constructed and the final aim, which is melting the metal, was achieved. 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.

Cross-section view of crucible. Electro-slag remelting Vacuum arc remelting Argon oxygen decarburization.