well over the last few days ive built a small furnace and a propane burner.
last night i fired up the burner and turned it down just enough to keep a flame stuck it in the pot to slowly bring up the temp to dry.
when done i stuck in my crubicle with some alumn turned up the burner and 2 hrs later it is still not melted why? obviously its not hot enough but why isnt it?
i built the burner from backyardmetalcasting.com