I have a question about induction melting. I have always used
torches to cast, but really wanted to get an induction melting
furnace later this year. Not that torches are bad, they work okay
for many situations. All I need is something to melt up to 2 or 3
troy ounces of metal. However, many of the items I will need to melt
are at platinum’s melting point and higher. I have a scientific
background, but I definitely wanted to ask someone who knows these
things before I purchased something. For small scale melting, will a
small table top 120 volt 1.5 - 2.5 kW medium frequency (25 - 100
kHz) system work? Unless it screws up the casting, I am not worried
if it takes more than 1 minute to melt. I heard that using the
induction systems are really easy, but it seems like the choices are
not so simple. You have the skin effect from the frequency, the
output power, number of flux lines per unit volume, magnetic
susceptibility, and other things! Does any of that matter?
What seems appealing to me is that you could use cover gases and
vacuums much easier, control the input power better, and the
stirring mechanism from the medium frequency eddy currents. Are
these safe assumptions to consider versus the torch?
Thank you very much.