Thank you for your good advices.
The idea is not to cast parts or recycle scrap alum. but to use the phase change of a given amount of clean (and chemically "flat") alum. in a "thermal battery". So the same alum. is to be remelted over and over. Nasa used graphite crucible...
What would be the best material for holding a small amount (one cu. ft) of liquid aluminum at its melting point (1220 F or 660 C) at atm. pressure?
Do I need to use costly ceramics (Silicon carbide, graphite) or does Stainless Steel (304?) can do the job?
