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Building a forge | onikudaki.be

My current fire is bigger, but the same principle

Looks great. I love DIY forge fires.

I don't know about pearlite, but my mix is dirt cheap. The cement is plain cement, and kitty litter doesn't cost much either.
It serves the dual purpose of keeping heat inside through insulation,...

My lining probably won't help you. I use charcoal. My recipe is 1/3 wood ash, 1/3 ceramic kitty litter, 1/3 plain old cement.