Thread: Working on a mini forge for my son - making progress

Yes. Some of the best forges I have run, have only have one burner. I generally use the rule of one (venturi) burner per 10-12 inches of forge length. For a type you propose to build using kaowool or the like. The venturi is a 0.028 orifice directed down a 3/4 inch pipe with three or four 1/2 inch holes for entrained air (depending on altitude). You may have to adjust the air/gas mixture depending on your local environment. My experience tells me that this general ratio is very tune-able and will hold a fire at 1500 degrees or run up to welding heat and all that off a typical 40 pound BBQ bottle for many hours.