Casting aluminum ladles - GIF

[mwmkravchenko]

Coating is definitely a graphite based refractory coating. This is really cool. I have done a lot of aluminum, casting is years past and I am impressed with this. A porous concrete probably a refractory concrete is the exterior of the mold. I will see if I can dig up anything on this idea. Got me thinking! Concrete on it's own made from portland cement ios not something that will last very long. It has a lot of water bound up in it's chemistry. Makes for molds that are quite short lived.

As for melting chips. Unless you have seriously compacted them into some solid form have fun with that. So much surface area for oxide to make your life hard. If you have a press and a way to make hockey pucks you might be able to make it work.