After messing around much with the naturally aspirated burner - I decided to try a new idea - and use a blower (actually it's a hair dryer) - It's not very "elegant" but I will work on that - but the results were amazing to say the least so I had to post about it!
I wish I had a high temp thermometer to see how hot the furnace was getting - but the crucible (made from one of those tall skinny propane bottles) was red hot in about 30 seconds and got pretty soft itself after a while!
OK - so this burner is made up of:
- The same high pressure regulator from the hardware store (0 to 10 psi) - Get yours here!
- 8" long 3/4" pipe nipple (note the black iron pipe)
- 3/4" X 3/4" X 1/2" Iron Pipe T (this piece is still galvanized but that's OK it does not get even warm)
- the 1/8" to 1/2" Male Pipe to Female Iron Pipe Bushing brass adapter from before
- 3" long 3/4 nipple (just to have somewhere to connect the air supply to)
- the 3/4" to 1" bell reducer from before
- an old hairdryer (for now)
Check out the pics - pretty simple design and really great results (if I do say so myself) - and soooo much easier than worrying about propane jets and special mig welding tips and such.
Basically I turn on the air supply (hair dryer for now) - turn on the propane supply (about 6-7 psi seemed to work best) and light it up... That's it :)
I will upgrade the hair dryer to some sort of mini blower and then I think this project will be fully functional :) Finally - I can make progress on my other projects :) LOL - Speaking of that - check out the first part I cast with this new setup -> First Cast Part