Make a Small, Practical Forge


Introduction: Make a Small, Practical Forge


i'mma making another instructable, showing what you can upgrade this to without much work. coming soon!

This instructable will show you how to make a small (no more than 2 feet by two feet) forge for melting lead and/or heating thin-ish steel to shape it.

Unfortunately, i only have pics of the forge in action, as i didnt think of making an instructable until i came in.

Be careful with this, as it can produce high temperatures and will almost certainly injure you if you touch the bricks after use. Give it about a 2 day cooldown period just to be safe.

Step 1: Bricks!

You need them. anything from 5-11 will work fine. If you only have 5, you can only make one layer though :(

Also, something to put underneath it. I used roofing slate, and although it cracked because of the heat, it kept it burning REAL hot.

Step 2: The Build Stage...

Place the slate on the floor. Now, make a pentagon using 5 bricks on their sides. Move two apart to make a small gap, so that you can light your forge etc. Add your second layer in much the same way, except (if you only have 10 bricks like me) only using four. If you have more, use 5, but stagger them from the ones below.

Step 3: Fuel!

I found that wood works best for me, as most of mine is dry + easy to cut. But, im sure coal will work fine, as will charcoal etc. Experiment, and see what results you get. To make it melt lead, add a piece of metal over the top, on a slant (this is what the extra brick is for XD) and place your lead in the centre of the metal over the fire. This WILL melt the lead, after it has gotten to heat, and it almost certainly will direct flame out one side flamethrower-style (if not with the range).




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    i have based my forge design of of this and has worked great. (kinda). after using both charcoal and wood i have found that while charcoal burns longer, wood burns hotter. perfect example is that my forge when first used had charcoal and burned well in a closed area for more heat.

    howver when i switched to wood with an open furnace the briicks started exploding from intense heat.

    I start with wood, then add some coal. It burns longer and plenty hot. Works well for me, I like the low tech approach of this.

    i cot my wood in potroleam jelly and hand sanitizer it makes the flame hoter but dont get any on your hands or it will but them

    Great Instructable! I was looking at how to make a forge and all the other ones were too hard and expensive. :)

    2 replies

    ayeaye, but i wouldn't recommend building this for anything other than melting lead/heating thin steel When i build my new one, there'll be step-by-step instructions on how to build it and it should be grand. the one i'm working with at the minute is amazing, it follows the same basic design as this, but is square and uses a lot more bricks. if you want more info on my new forge, send me a message or a comment and i'll be glad to help

    plz make an insatructable fir it

    c'mon guy, just melting lead is a noob thing. u know what? u can do this simply using a tin/aluminum container and ur stove, c'mon, i know u r more intelligent than this guy, c'mon...

    So, what's the deal with a burn permit on this. Yes, no, depends on...?

    1 reply

    nevermind, just figured out it wasn't an open flame

    no offense, and i realize that i am not an expert in this area, but lets just say there are better ibles.

    1 reply

    There are. i've improved this massively since then. it now runs on coal and is highly efficient... melted thin steel plate a while ago :( it was my crucible for melting lead... i looked back and had lost the bottom of the crucible.

    Unless you super size this, no. The melting point of aluminum is 1220 degrees F, and he said it can melt lead, so the forge probably goes up to about 621 degrees F (melting point of lead). Just google the material and 'melting point' and you can usually find the temperature pretty easily

    your plain old average campfire can get steel and iron red hot as well as melting lead

    could it melt steel?

    It would take alot of heat but it may be possible. just make sure that for the crucible you use something that has a much higher melting temperature than steel.

    you could do it if you added a better air system... mostly what i used was my own lungs and the natural draw, which usually lead to me being out of breath

    lol, OK well I have an air compressor.

    Blow dryer works good too. btw. And a cheap low-power one will be less expensive to run then your compressor. You won't get as much air pressure, but that really shouldn't be an issue. It should be plenty for aluminum. Aluminum foil melted can be used like paint. Very neat effect.