Hello all,
I got myself a box of firebricks, and stacked them so that the area inside my little forge was 81 cubic inches. The only burner I have right now is a plumber's style propane torch- and that's not likely to change until well after the holliday season, whether I'd like it to or not.
I'm guessing that the volume of the interior is just way too big for what I'm doing- it will heat a 1/2" bar to a dull red, but it's even slower than just holding the torch on it in the open air.
The interior dimentions as I've got the bricks stacked are 2" wide,
4.5 " high, and 9" deep. I've got a hole drilled at a approx. 30 degree angle (pointing slightly upwards, so the tank can sit nearly upright) in the center of one of the firebricks on the side. The firebricks are cheap fireplace liners from Menard's, 4.5" x 9" x 1.5".There are some cracks where air can get in due to the roughness of the bricks, and after a little experimentation, I made an opening of about
1.5" x 2" on each end by laying a firebrick on each end. That seemed to work about as well as it was going to work- which is not very well, of course.I'm sure there are some problems with the design that will be immediately apparent to someone with more experience, so I'm hoping one of you guys will have an idea of how I can tune this up a bit.
What I *can* do within my resources and budget is cut the firebrick to whatever size is appropriate for a propane torch forge, and make a metal box out of anything from 11-20 ga. 1018 or 301 stainless that the firebrick can slide into- I think I could also manage to get a second propane or mapp gas torch. hopefully, that's enough to get me going!
Any suggestions, and particularly info related to volume and vent opening sizes will be really appreciated. I'm sure I'll upgrade to something better with a real burner and that ceramic insulation soon enough, but I'm just messing around on a budget for now.