I've been looking at the heat treat forge that @John N posted recently and I've been seriously considering building something similar. My hope is to be able to control the environment to the point that I can move into some of the more higher end blade steels that require a soak at a given temperature in order to get the most out of them. As I was doing some cleaning in my barn today I stumbled across this old Coleman camp stove that I had completely forgotten about.
The flame is easily controllable from what is shown, all the way down to a tiny ribbon. This got me to thinking and doing some rough designs in my head. I quickly sketched up a rough concept before I lost my train of thought:
This inner chamber is 8" x 5" x 18" long and the baffle sits about 1.5" above the floor of the chamber. That comes out to about 720 cubic inches and should be more than big enough for any blade that I'll be tackling in the foreseeable future. There's a lot of detail missing (like the door) but I think this conveys the general idea. I'm thinking that 1" of Inswool all around should be sufficient insulation. I'm basically planning on setting the forge right down on top of one of the burners which would allow me to use the second burner to heat up my quenching oil (and still allow me to keep my campstove intact).
I've never played with this type of burner before and I have a couple of questions I'm hoping I could get some insight on. First off, I'm planning on leaving around a 1/4" of air gap in the tube around the outside of the burner. Will this give sufficient airflow for the burner to operate properly? Is it too little, too much? Also, will I need a vent of some type (maybe in the door) to help control the heat? Or is that unnecessary or even counterproductive? Most importantly I guess, is this even worth spending time on? I haven't seen anyone post anything on a build quite like this but I'd hate to waste a bunch of time and effort on something that won't even do what I want it to do.
Any thoughts or insight would be greatly appreciated. Thanks!