Hello!
Not understanding a burn system I built a few years back. Maybe it’s simply makes charcoal. I made a 6”x8” box with door. Inside was a shelf 1” from bottom with a 1” hole in both the shelf and box. I took a 4”x6”x1/2” Steel casing, with bottom, with a 1” hole in center, and a removable top plate with a 1”hole in it. I then took a 1” pipe, placed it in the 4”x6” pipe, standing it up in the bottom hole. I then packed sawdust inside around the 1” pipe until full then removed the 1” pipe, placed the Lid on, placed the 4x6 on the shelf, shut the door and lit from underneath. The 4x6 has a wall it slides back against, the wall extends from the top of the 6x8 box down, leaving a 1” gap at bottom behind the pipe with sawdust for exhaust. We kept looking inside because we never seen flame or smoke, but knew from the heat it was doing something. This thing held maybe 2 cups of sawdust. Day was done and one of the guys reached in to remove the inner pipe with sawdust, with quality welding gloves, it immediately burned him through the gloves, he dropped it. The lid came off and the sawdust was still in its form, yet a black solid mass, that only fell apart after hitting the ground.
