I could make a quick video to show my burner build - I havn't really seen anything else like it, it's a mish-mash of different styles. I went with a side entry so I could make the screw-on choke. Will try to get something done tonight.
Basically, .035 welding tip into some brass couplers and plugs. A 1.5" mechanical coupler is the outer housing, with the threaded rod and a 1.5" washer with a nut welded to it as the choke. The rod is inserted into one end of the brass coupling and loctited in there. Using an acetylene regulator on this one, and the outlet is a 3/4" pipe. If you're just melting aluminium, a regular propane 5-10 lbs regulator and an .025 tip works great.
I've been getting alot less slag and dross since I started using this setup (noticeable with my alum and brass mostly). I have a theory that this choke set up limits the air flow so it creates less oxidation of the media being melted. I'm no scientologist though, so that's just me spitballing.
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