I came across a kiln that a neighbour was throwing out, and decided to make a forge. Finally! What I always needed!
So I have 51 soft bricks(4.5x2.5x9) to work with. I can pick up some hard bricks without hurting the bank account too badly. 5.99 each at home hardware.
About half of my free, soft bricks are cracked, and the other half aren't.
The is photo is the first idea I had. Feel free to add your two cents. I'll be seating the final design in a metal frame, but am playing lego on this piece of ply for convenience sake.
I wondered about mixing a thinnest style mix to coat the interior floor of the forge to protect the soft bricks.
I'll also be adding a propane head source, but thought I'd start with the box. The chamber itself is 7"wide, 4.5" tall, and I think I could go three bricks deep if I wanted, I think 27".
I've also got a million red bricks I could use. Which I considered as the base layer of the forge, which would be cost effective(ie. Cheap.