How To Make The Mini Metal Foundry

How To Make The Mini Metal Foundry

How to make a simple backyard foundry for less than $20, for melting pop cans, and casting aluminum.

[✓] Clay Graphite Crucible:
[✓] Steel Pail:
[✓] Plaster of Paris:
[✓] 2.5 Quart Bucket:
[✓] 5 Quart Big Mouth Bucket:
[✓] Heat Resistant Gloves:
[✓] 1-3/8” Hole Saw:
[✓] 3” Hole Saw:
[✓] 1” x 12” Steel Pipe:

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Endcard Links:

Pop Can Metal Melting:
Secret Safe:
Acrylic Fire Piston:
Bottle Rockets:

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Charcoal foundries can reach temperatures in excess of 1,000ºC, which is well above the melting point of hobbyists. This project should only be attempted with adequate knowledge and training, proper protective safety gear, and in a fire resistant area with adequate ventilation. The sparks flying from the foundry can ignite fires, and the fumes from burning dross can be toxic. Use caution and common sense. Use of this video content is at your own risk.

Music By: Scott & Brendo (“Feel It” – Instrumental)

Project Inspired By:

This foundry is an original design, which comes after months of experimenting, and over 10 different prototypes. The functionality is founded on ideas I collected while searching the internet for different furnace designs.

Project History & More Info:

For this project I experimented with 10 different prototypes, to develop a reusable backyard foundry that melts aluminum soda cans easily and safely. I tested different refractory recipes, different containers, different setting for blowing air, and different types of makeshift crucibles.

I tried various ratios of portland cement, sand, perlite, plaster of paris, water, and even kitty litter. For containers, I experimented with clay pots, plastic buckets, no container, cinderblocks, and a galvanized steel pail.

I ended up favoring the galvanized steel pail, and a mix of 50% plaster of paris, and 50% play sand, by volume, which was inspired by a video by NightHawkInLight “How to Make a Soup Can Forge”

Depending on where you get, or find, your materials the cost can range anywhere from $5-$25 per unit. With the materials I used, I was able to make 2 units for under $40 ($20 each). Even on the high end, this is probably one of the cheapest, reliable, backyard foundries that can be made.

I used mine to melt soda cans, and extract the aluminum for future metal casting projects. All the soda cans came from a local recycling depot. I bought back 30 lbs from the depot to avoid having to drink gallons and gallons of soda. 🙂 I stored the ingots in various forms, which you can see in the video”Melting Cans With The Mini Metal Foundry”
The technique for making the sword in that video, and the gun in this video is called “Lost Foam Casting” and will be demonstrated in a future project video.



Mind Wide Open says:

I'm attempting to make a foundry like this, with propane instead of coal, but my refractory cement is not setting up. Any idea why?

asonalya ruiz says:

Hi, a small question, if we practice this as a hobby in what way it can affect us?

JIN Gunner says:

Can it melt brass casings ??

Kelli Hovanes says:

How many firings will this stand up to?

XYXZProductions says:

Your math is wrong. 2.5 quarts * 1.75 = 17.5 cups not 21

Alan Day says:

I love that you are using SCOTTDW's star trek music.

Karin dogs says:

Would this recipe work to pour into small molds?

Winter Soldier says:

U gotta get plastered in paris!

killerfrenzay says:

What happened to you man

moustafa refaat says:

should i use play sand or any type of sand ?

Noodlzgaming says:

im goning to make this

Jake J says:

Looks kind of difficult to build. Maybe I could just buy one 😂

Dylan Funk says:

dose it have to be plaster of paris

Random Games says:

This doesn’t cost 20 dollars just the plaster of Paris and play sand almost cost more than 20usd

Lan Jencic says:

Hi King, melt a salt and see whats happens.

Tristan B says:

I like these old types of videos better where he just kinda narrates

Hank Chouinard says:

Couldn’t you just use concrete?

Simut Adi says:

In this furnace you can melt cast iron? or just aluminum? or for cast iron I have to use propane, because the coal does not release enough heat? Thanks and greetings for yours success. :))

Vuurwerk Team IJsselstein says:

Plaster of paris is that just plaster or is it a special type of plaster

Vuurwerk Team IJsselstein says:

Does it need a air pump?

J Fidel says:

Could I use coal or shale instead of charcoal in my Mini Metal Foundry that I built?

SDG 2.0 says:

how hot does it get?

Loredana Barbetti says:

what's the use????

Jamie Mcglen says:

Off you can't find an empty fire extinguisher, try using an empty blowtorch, like the ones used in residential plumbing. Hope this helps.

FizzyElf says:

Can this melt bullet shells?

FizzyElf says:

Thank you this is rad

Cole Vlogs says:

wait this is more than 20 dollars

yasin khan says:

I love your all videos

robotics team says:

What will mercury do in a a metal foundry

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