You forge us is for heating rivit's A friend of mine uses one as a moble set up. He has a ring of steel about 10 in in dia which holds the coal tight over the blower. the ring is about 1 1/2 in wide.
I start mine off with a pine cone wraped in 1 sheet of news paper then place it in my turee pour coal over the pine cone. I use a weed burner hooked up to a propane tank light it off turn on the blower and in a few minutes you off to the races