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INDUCTION FURNACE
The principle of induction melting is a high voltage power source of a primary coil induces a low voltage, high current in the metal, or the secondary coil. Induction heating is simply a way to transfer heat energy.
Induction furnaces are ideal for melting the alloy and a variety of metals with a minimum of melt loss, however, some metal refining. There are two main types of induction furnace: coreless and channel.
Coreless induction furnace
The heart of the furnace is a coreless induction coil, consisting of a hollow section of heavy pipeline high conductivity copper which is wound in a helical coil. The coil form is encased in a steel shell and the magnetic shield is used to prevent heating of the carrier surround. To protect against overheating, the coil is water cooled, water-bing recirculated and cooled in a cooling tower. The shell is supported on the stumps in the oven awning for easy emptying.
The crucible is formed of a granular refractory ramming between the coil and a former inner hollow is merged with the first heat leaving a sintered coating.
The cubmicle voltage and frequency becomes main stream ot required for electric melting. The frequencies used in induction melting range of 50 cycles per second (frequency) …show more content…
This action forces stirring of the molten metal to rise up in the middle so that the characteristic of the meniscus on the surface of the metal. The degree of stirring action is affected by the applied force and the incidence and the size and shape of the coil and the density and viscosity of the molten metal. The stirring action in the bath is important as it helps to blend and melt the alloy chips and homogenization of the temperature throughout the oven. Excessive agitation can increase the gas collection, casing wear and oxidation of

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