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Making a Simple and Easy Charcoal/ Coal Forge

Making a Simple and Easy Charcoal/ Coal Forge
In this instructable you will learn how to make a charcoal / coal burning forge from firebrick, a few steel plumbing parts, a steel sheet, some cinder blocks and a blower

Unfortunately I ran out of money before i could finish the forge, in total it should cost around $ 50 USD depending how fancy you want it. The plans you will see are paint mock-ups from my actual design, i do not own a scanner so I had to make pictures.

This is what the finished forge should look like

 
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Step 1Why a forge and getting started up

Why a forge and getting started up
When I first discovered wanting to take up blacksmithing as a hobby, I searched and searched for designs and a website to help me get started. Then i discovered AnvilFire, they have some F.A.Q.'s and a whole bunch of info on starting up. They also have a help section called "Guru's Den" you ask questions and they will answer them.

As a begainner at Blacksmithing they recommend to build a forge out of a Brake Drum I decided against it because I really didn't want to be using a rusty piece of junk to hold 3,000 degree charcoal and white hot iron.

So i asked the guru guy a lot of questions.

And I made plans on it

Basically its fire brick in a square pillar shape stacked like a brick wall
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37 comments
Mar 14, 2012. 11:03 PMshadus says:
You actually CAN use galvanized steel pipe, however you need to remove the zinc coating on the pipe prior to heating it above a couple hundred degrees. There are two ways to do this,

1) you can throw it in another forge... make sure it goes well over the boiling point of zinc and make sure no one is close enough to breath the fumes or that you're outdoors and stay well clear. Takes about 1000 degrees to do this. Give it a while at that temp. Keep in mind overall, unless you have lung problems, even if you do breath it... you're likely not going to die, but you will wish you were dead. Zinc vapor is rough and it'll lay you low for a day or more.

2) alternately, you can submerse it in vinegar for a couple days (or boiling vinegar for say a day) until the zinc is completely removed, a faster process is giving it a muriatic acid bath until it quits fizzing, but then you have to neutralize it in a soda bath or similar. In either case you need to give it a coat in something to prevent rapid rusting.

The better option of course is using "black" plumbing which doesn't have a galvanized zinc coating... but 2" "black" plumbing is getting increasingly hard to find... and 2" galvanized is still very common. YMMV.
Jun 9, 2010. 6:21 PMbombmaker2 says:
You may want to check out the links you provided in Step 1. I cannot connect to them for some reason.
Jan 12, 2012. 9:58 AMpj63 says:
i had the same problem.... However if you Google 'Anvilfire' it shows you the web site.... pj63
Aug 23, 2011. 7:57 AMhard2bme says:
THIS IS MY FOUNDRY IM USING COAL AND I JUST CANT SEEM TO GET IT HOT ENOUGH TO MELT COPPER AND WHEN I MELT ALUM IT TAKES LIKE 20 MIN HOW CAN I MAKE IT HOT ENOUGH TO MELT COPPER I CANT USE GAS OR PROPANE IT HAS TO BE COAL
COULD ANYBODY HELP ME OUT PLEASEEEEEEE



Nov 4, 2011. 3:23 PMrepear9 says:
First off do not use caps lock like a troll, Then i would be glad to answer your question.
Oct 14, 2011. 7:47 PMTheSaltyPilgrim says:
Hey I would just like to point out that this is a forge and not a crucible. to all of those looking to melt various components, you need to look else where for a crucible. This forge is for forging red hot iron and steel. I'm reiterating to save you time, frustration, and false expectancy. This forge is not meant to melt objects.
Aug 23, 2011. 5:47 AMhard2bme says:
i just cant get it right im using a hair dryer right now but i just cant get my charcoal hot enough it takes like 20 min to melt like a pound and a half of alum how can i make it hotter
May 23, 2010. 3:22 AMdnorm says:
i guess it would be a pain to buy real coal, but how about making your own charcoal?   all you need is wood, and a type of furnace  (which is what a forge is)    tho im sure you dont want to use chemically treated lumber, anything that has been painted, stained or varnished, particle or flake board or plywood, panelling, or any type of 'fake or composite'...     but scrap pieces of plank or 2x4's?    why not?...   and it wouldnt have the 'extras' the 'consumer' charcoal does...
Apr 14, 2010. 5:38 AMBarricade823 says:
OK so i really like this instructable
the only problem I have is that it took my like four or five reads and examining of the diagram here to realize what was going on.

If you could please maybe label or color the fire bricks different from the cinder blocks used to support the forge that would be great.

And another quick question, without putting a top on the forge, wouldnt that mean that all the heat would just quickly escape?

Thanks,
Nick
Feb 12, 2010. 9:07 AMj902771 says:
3 or 4 sheets of old dry news paper crumpled in to a loose ball laid in a triangle on top of the forge floor, then if you have any pine cones put a pine cone on top of the paper balls, then put your charcoal chunks or coal up the sides and all over the paper and pine cones,  just cover the whole thing up. then light the paper with a match.  slowly give this some air with your blower,  then a little more air after about 30 seconds,  then a little more,  and so on for about 1 and 1/2 minutes then pore on the air.  fire should be nice and hot.  Have been doing this for about 30 years.  works great.
Dec 20, 2009. 5:39 PMspylock says:
You can make one fairly easy out of a wheelbarrow,a couple fire bricks,clay,a squirrel cage fan,and a few plumbing parts,Id say 100.00 cost max,cheaper with and old wheelbarrow that you dont use anymore.I saw it made on a show called Forge And Anvil,I think,but Im sure you can find the disigns on the internet.
May 2, 2009. 12:26 PMdciocoiu says:
Not bad for a beginner black smith , but i would strongly advice to use fire place ciment that witstends very hot temperatures and you should paint the inside of the forge as well as the outside with the cement.
Mar 23, 2009. 9:19 AMdogsoldier69 says:
LIGHTER FLUID to start the forge?? BAD idea, as putting ANY kind of combustible fluid in to your forge is askin for trouble. Fast, awright...but dangerous?? SURE IS. Better (& more fulfillin, for what that's worth) to start your fire with wood shavins, kindling, then the charcoal/coal , add an air flow & there y'are
May 20, 2007. 7:45 PMMitten says:
i just use a coffee can with holes poked in the bottom and a hairdryer ...
May 20, 2007. 8:56 PMMitten says:
coffee cans are made from steel, and it gets hot enough to melt aluminum in a steel canned veggie can in the middle of the coals without melting.
May 22, 2007. 10:57 AMVendigroth says:
yeh, but you're subjecting the can to intense heat for a long time, the steel turns so crusty and anaemic that you can literally poke a finger through it.
Jul 21, 2008. 11:04 AMDerin says:
but if you poke your finger thru,u can say this: "What's in the box?Pain."
Jun 10, 2008. 2:41 PMDigital_Anarchy says:
LOL aneamic steel, the irony.
Jun 12, 2008. 11:41 AMchuckr44 says:
Ha ha ha! I get it. "Iron"-y.
Mar 4, 2010. 4:04 PMjosh1324 says:
ROFLCOPTER!  LMFAO!
Aug 16, 2008. 12:50 AMDerin says:
rofl
Mar 10, 2008. 12:09 PMBARBARIANROCKER says:
folks i use a castiron cooking pot to melt stuff down. the wife may not like it but oh well.
May 22, 2007. 11:00 AMVendigroth says:
hey, acer73, great instructable and thanks for jioning the Forge. I'm looking forward to seeing some good stuff from you in the future, hopefully made with this forge. M'self, i'm planning to do an instructable on a forge, different to this but roughly the same size When i make it, i'll have to make stuff with it....
Dec 29, 2007. 2:45 AMJames (pseudo-geek) says:
now here I've been wondering where that pic is from for months and now I realize its the "G-man" from Half-life 2
Dec 29, 2007. 4:26 AMVendigroth says:
_
Best. Character. EVAR.
Dec 29, 2007. 1:08 PMJames (pseudo-geek) says:
personally I hated him for what he was doing, but I LOVED how he talked, it was awesomely creepy.
Dec 29, 2007. 2:06 PMVendigroth says:
it takes a little thought to realise that Gman's on Gordon's side.
Dec 29, 2007. 6:17 PMJames (pseudo-geek) says:
o.O how so?
Dec 29, 2007. 6:19 PMJames (pseudo-geek) says:
heres one of my reasons, which I believe is proof. the Vortagons cannot be evil, it is grafted into their nature to be on the good side. If they fought to stop the G-man, then he must be evil.
Dec 30, 2007. 5:57 AMVendigroth says:
The Vortigaunts only fought against you in HL1 becaus they'd been enslaved. After that, they came to earth as refugees to help fight the Combine. They stopped Gman because they needed Gordon for their own tasks, like getting Alyx out of city-17. HOWEVAR: Gman rescued the baby Alyx from black mesa...and the Vortigaunts saved her life in Ep.2...each side's playing different games, using Gordon as the ball, so to speak.
Dec 19, 2007. 9:42 PM5George5 says:
good instructable any metal subjected to heat oxidizes (rusts) much more quickly. it will flake off and mix with the metal which isnt a big deal unless you're melting gold or silver. then you need to use a graphite crucible. anyways it just gets weaker a lot quicker when it gets hot
May 23, 2007. 12:55 PMjtobako says:
Nice. A few points. CLAY brick works, and the only firebrick that the big box hardware stores carry (around here) are the 1" thick wood stove liners. You have to go to a ceramic supply for full size firebrick. I've heard that masons carry firebrick, but haven't had any luck there yet. How is a 1/4+ inch thick cast iron brake drum different than your steel plate? Electrical conduit is zinc plated (just not as thick). If you are using a steel plate, just drill holes in it where the flange comes in. A larger diameter pipe means you can drill more holes : ) My furnace blower hangs off the horizontal pipe using a floor flange-I cover up part (most) of the intake to control air flow. If your air pipes are getting hot enough to burn zinc, SOMETHING IS WRONG. And, a small amount of zinc won't hurt you.
May 22, 2007. 12:47 AMFrenchCrawler says:
Aluminum melts at 1200 degrees F. I used a medium paint can as my crucible when I first started... but after the first batch of cans (about 30), the can couldn't hold up to the heat and sprung a leak. I'm still using the store charcoal, though I'm looking into getting some coke (not the drug).

My forge/furnace consists of a large (5 gallon) paint can buried into the ground with 2 metal pipes underneath. One pipe for drainage of any water that happens to get in and the other for the blower (I'm using a wet/dry vac). I have a round section of chicken wire in the middle of the can to hold the coal up on the sides of the furnace and in the middle while allowing the crucible to go into the middle and letting the ash through. I then take the vac and suck the ash out once the furnace cools down.

A simple furnace is described in the "Back to Basics" book. Instead of using the fire brick/ concrete, use a Truck Brake Drum and place a metal grate into the bottom. Here's a site to show what I mean.


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Author:acer73
Hmmm, I'm a Junior in highschool and am in the marching band. I like to fiddle with stuff and find out ways to control fire.