Greetings!
I'm in the process of building a coal forge built around a large brake drum. I fired the forge a while back with charcoal
Right now I'm building up the middle of it with the Pearlie and furnace cement refractory mixture, and wondered how high I should build it in the middle. Is there an appropriate slope from the rim to the center that I should be shooting for?
I was also thinking about using a 3" pipe cap with 1/4" holes drilled in it as the thing in the middle with holes in it that allows air in, and keeps the coal from falling down into the trap (tuyere / clinker?). Cheap, and easily replaceable. It's not clear to me what makes a good vs. bad clinker and would appreciate some advice.
Thoughts? I'm a traditional woodworker looking to make some simple tools (chisels, knives) as well as doing some heat treating.
Thanks!
Chris