I needed to melt some lead recently, to make a weight
[1]. I used a
propane blowtorch -- one of those ones sold for light brazing jobs. It's
like the typical home butane blowtorch [2], but the flame is considerably
hotter.
A wood fire will melt lead. I and my brother did that years ago to
melt little scraps of lead into one larger block.
Cheers,
Wizard