I am no spokesperson for Induction melting,but I have spent a major part of my life with Induction furnaces.
Arc furnace provides a simple and effective way of melting various grades of scrap and then going ahead to refine the metal to your specification. It is also useful in making tool steels and alloy steels. This provides a method of utilising low cost scrap,which is available in abundance.The key advantage in EAF melting is that refining is possible and you can also produce low carbon steels.(my experience has been upto 0.08%C).
EAF practice needs experienced melters and operators who are in short supply. Also the cost of graphite electrodes and refractories increase the operational cost. Energy cost formelting compares with Induction furnace.
The cost of EAF may be low compared to Induction furnace, but the cost of electrical transformers,switch gear,cables will be expensive. Additionally you have will have to instal expensive pollution control equipments to meet your local laws.
For the batch type of operations you are envisaging,Induction melting will be desirable. Normally where the liquid metal demand is above 25 tons on a continuous basis, EAF is installed.
The major drawback in Induction melting is the use of clean and segregated scrap,which is expensive and the absence of any refining.
Installation of the equipment is quick and a low skilled operator can un the furnace. You are able to produce very low carbon (0.03%) grades in induction furnace. Also changing grades of steel can be done on a heat to heat basis.
If you are looking for a 5 ton Induction furnace, India can be your choice as you might be able to get a sparingly used furnace at less price.
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