Smelter for AL

This is $100 I can for sure pump air But I did not realize the cement will probably not hold up
My yard has taken melted from the fire pit AL . It's possible they take things from me that others would get hassled for ,yet there is the element where they think I am trying to get over on them . Since I have not had a chance to do a real controlled melt with a finish product . I have to believe if you mix pot die cast AL with real AL
the look has to be compromised.
Ok I wanted to melt CANs that I can get with no deposit on them . Next are these AL chunks from electric company trash they have porcelain on them and a steel shaft . If I cut the shaft and chop out most of the porcelain they still say that little bit of ceramic wont let it pass as clean AL. But the AL weight is so real I hate giving it a way.
Bottom line I would like to have AL bars but if I see it's not a marketable item cause of trust . I can take Multan AL and pour it in a bed of ash and get the haphazard shapes they always take from me

To bad about one thing, I have taken apart 30 to 40 boilers some large ones now I'm thinking how nice it be to have the cement shapes that fit together like a puzzle, I feel I could of used it for some thing

As to the fuel I want to use what is lowest in cost I feel charcoal with a shop vac blowing has to get hotter then my fire pit . If I use propane might be to costly , How much AL can I melt for 15 bucks consider 30 pound AL is worth $15

It must be refractory cement , I see looking at the fuel comparison
Charcoal VS. Propane as fuel
what i want to buy is for gas and I bet a great gas melter It was used for gold and nickel in the past But look at the size of that pipe how can that be cost effective it has 4 burners in the pot.
I see on the INTERNET people take old propane tanks and convert to a smelter using cement and use charcoal maybe I could
use carboard between the cement like you use it for the crucible to stop Cole from sticking