The Dragon Lady makes short work of the melting. Much faster than charcoal. When the Lady gets going you can't see what is happening. But it is turning into a liquid at a great rate. There is a lot more to this. I recommend the Dave Gingery series on building your own machine shop from scratch. Especially Volume 1; you can Google on Gingery and get many hits.
After about ten minutes the scrap aluminum is poured into a sand mold. That is material for another post. In the meantime, if you are interested in sand casting, do look at myfordboy's blog, q.g., and look at his videos. This is a great blog; I am adding it to my follow list.
More to come.