I’ve seen many projects out there for building a foundry for melting aluminum to make castings. Most are based on cumbustion furnaces (charcoal or propane). A few are electric which has many advantages. None that I have seen are as easy to build as the electric foundry furnace I will describe in this instructable and none that I have seen work effectively on 120 VAC (they require 240 VAC to reach high enough temperatures). Unfortunately 240 VAC is not available in many home workshops.
See the attached video for a very quick overview of the project.”

Link