A friend of mine has a forge fired by propane that is made from a mini-keg (Heineken beer), with the use of Kaowool. We should be able to get temps of up to 2000 degrees F, but because of the altitude here (7000 ft), we are having trouble getting the temps we need . The whole thing is only about 16 inches long, and 9 or 10 in diameter, and really portable. Let me know if you want to check this out. I can get you in touch with the guy that made it. I will include pics, if I can ever figure out how to do it.