FWIW, here's a pic of a foundry furnace that I made from a beer keg. Big hit at blacksmithing events LOL
I've threatened to add a "TAP" to it........

bill what are using for fuel in your furnace is propane or oil? i like the idea of the keg you don't have to worry much about rusting out as to being stainless do you melt bronze in it or just aluminum ? any way it looks great i may steal the idea of the keg on my next one i build

Thanks, Orgtwister.....
I use propane. I do also melt bronze in it. I've got two other kegs that I've got plans to make furnaces to melt glass in......
FWIW, I use a forced air burner, but an atmospheric burner would work fine.