Thread: Kiln/Furnace for knife making heat treatment, who built one?

I made one of these for quickly heat treating small parts that wernt worth starting up my electric furnace for.
Super cheap and easy to make. The bricks are the lightweight porous type. Kind of similar to pumice. You can shape the hole in the middle using a spoon (yes a spoon) thats how soft the bricks are.
Power with a propane/butane torch or for more power, a map gas torch. I have heat treated blades up to around 90mm long with it. They are very efficient and effective.
I would not use one of these for forging.

Search google for 2 brick forge and you will have all the info you need.

Bricks are called K23 or Type 23 Firebricks. I bought mine from Certec in Auckland. They were $10 per brick, comes in a box of 8.