500 kg medium frequency aluminum scrap and ingot induction smelting furnace price

Product Description
Medium frequency coreless induction melting furnace working principle
No core is provided in the coreless induction furnace. A crucible of more convenient shape can be employed.
In this case, also the charge to be melted is made the secondary of the transformer. The primary is wound over the crucible itself. The eddy currents produced in the charge not only heat it up but also account for the stirring action. It is the basic coreless induction furnace principle.
Iron laminations are provided outside the primary winding to create a low reluctance path for flux and also contain the stray field which may otherwise induce the heavy current in supporting steel structure.
The frequency employed depends upon the size of the coreless induction furnace. For lower capacities of furnaces higher frequency of the order of 3000Hz are employed whereas for higher capacities frequencies are down to 600Hz. To reduce copper losses, hollow copper tubes are used in which cold water is circulated.
The operating power factor of such furnaces is very low (between 0.1 and 0.3). Therefore, static capacitors are used to improve the power factor of the installation.
Since the power factor does not remain constant during the operation of the furnace, the capacitance in the circuit during heat cycle is varied to maintain power factor approximately unity.
The coreless induction furnace is chiefly used for melting of steel and other ferrous metals. The capacities available vary from 250kg to about 20 tons. The initial cost is more as compared to arc furnace.
The advantages of coreless induction furnaces (for aluminum scrap and ingot melting use):
Low operating cost;
The automatic stirring action produced by eddy currents;
Low erection lost;
The absence of dirt, smoke noise etc;
Less melting time;
Simple charging and pouring, precise control of power;
Most suitable for the production of high-grade alloy steels.
Medium frequency power supply selection reference
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