Jump to content
I Forge Iron

Gas forge

Phil Patrick

Recommended Posts

Hello all. I have been doing some research on possibly constructing my own gas fired forge. It seems that alot of folks have enjoyed alot of success with them. The question that I need help with is this. I noticed that that most homemade and "factory" built gassers use Kaowool or the like as a liner. And of course, I have seen a fair hand full made with good old fire brick. What is the advantage of the Kaowool? Or, is a firebrick construction type just as serviceable?

As usual,, thank you in advance for all the help.


PS,, the blueprints on here have been a great help so far.

Link to comment
Share on other sites

The kaowool of course is lighter but also it does not absorb as much heat so it heats up quicker. It does not transfer the heat like fire brick does either. I have a forge made from an old 40# propane tank. I am currently using kaowool on the sides and top and the firebrick for the floor because it holds up better. I need to coat the sides with ITC100 but have not got around to it yet.


Link to comment
Share on other sites

There's also insulating firebrick, which is almost as good as Kaowool at insulating. It's much lighter than hard firebrick, much more durable than Kaowool, but not as much as hard brick.

Another material is insulating castable refractory. You mix it up like cement and then form it where you want it. It's about the same as insulating firebrick in insulation and durability.

Link to comment
Share on other sites

Please remember that Kaowool is dissolved by borax fluxing.
A good layer of fireclay tends to take care of that.
I tent to really like satanite brand fire clay but will use vulcanite brand castable if I have to.

I am working on getting the last photos for a blueprint on how to make a forge out of an ammo can.

The issue I have with many designs is that you need a full shop to build the forge.
I kinda boiled it down to basics

We have had great results with this
Ammo Can Forge Construction
Ammo Can Forge Construction - a photoset on Flickr

Ammo Can Forge Decontruction
(we tore apart the first one after 2.5 years of abuse to see how it was holding up)
Ammo Can Forge Deconstruction - a photoset on Flickr

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...