I would like to know if anyone has a ruff idea of the timeframe it takes for copper or brass to melt in a waste oil furnace. I am using a #8 crucible and can fit about 7lbs of either material in it at a time. I know that using propane it can take about 45 minutes but since I am using waste oil and it is direct heat surely the timeframe must be less.
Copper has a higher melting point of around 1084.62 °C Brass has a relatively low melting point (900–940 °C depending on composition) I have to agree on the point that gasses would be quicker to heat than the waste oil.
nope, propane will get hotter than waste oil, because its a gas already, the oil has to heat up to burn hotter, [convert its self to a gas] Mapp gas will get even hotter, i use it to braze alum, it has to be at 780 deg to start it , melting,
