The only cost here is the charcoal fuel duct tape and the 1 yard sale hair dryer.
How to melt aluminum into sheets.
This uses bbq charcoal as the fuel and a hair dryer as the blower it ll melt a small batch of aluminum in about 10 minutes.
Melting scrap aluminum into ingots 110kg or 242lb duration.
Place the lid on the foundry and let it warm up.
Blowtorch melting some aluminum sheet.
Most of the materials to build this can be found in dumpsters.
To cool it down faster use steel tongs to place the aluminum into a bucket of cold water.
Preheat the oven to 250 degrees f.
Blowtorch melting some aluminum sheet.
Add low salt to make the aluminum more fluid.
Heat for approximately five minutes.
The temperature in the foundry will need to be above 1220 degrees fahrenheit 660 degrees celsius.
Once you know the setting on the dimmer that the aluminum starts to melt at mark this on the dimmer.
Fire up the kiln or furnace to 1220 f.
The aluminum will melt almost immediately once it reaches this temperature.
Put the aluminum into the pot and turn up the power gradually until the aluminum starts to melt.
This is the melting point of aluminum 660 32 c 1220 58 f but below the melting point of steel.
After about 10 seconds the aluminum will still be hot but safe to touch with your bare hands.
Place hardened aluminum into a bucket of cold water using steel tongs.
Let the foundry heat for about 10 minutes before placing aluminum inside of it.
Add baking powder and mix to remove air and trapped gases that may cause air holes in metal later.
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Use a long metal ladle to scoop off the stuff that floats to the top when the aluminum is melted called dross.
The large pan prevents the plexiglass from coming into contact with the hot rack which can distort the plexiglass due to uneven heating.
Load your cans into the container you re using as a crucible and place the crucible inside the kiln.
Using tool remove all the lumpy slag from the aluminum.