Burner by me
This is my burner, its a combination of all that I have read about burners.
The venturi is my own design, an experiment that seems to have worked.
There are still changes I'd like to make though.
My first brass casting, a combination of old brass fittings. I used the Reil
type burner to melt the brass, it took about 45 minutes to pour. The flame
looked good, just missing something.....Or just maybe my construction,
naw couldn't be.
This is a heat using the Reil burner. Not too bad I would guess the flame
about 2100F plus degrees. This is based on the fact that I have 2000 degree
fireplace seal around the lid. And it melted the seal. Heat times from a cold
start to pour, was 25 minutes.
This is the flame from my burner. It's got a little better shape to the flame than
the previous burner, and this one will probably get as hot or hotter then the last
burner. The heat time was reduced to 15 minutes using ingots for the melt. The
only change was the venturi.
The construction of my burner started when I couldn't get exactly what I wanted. I built two other burners, both did the job required. But I like designing and building things my self. I took a good look at the burners and decided on some changes. Just to clarify, my burner is in no way original, but a compilation of several. The venturi is the only part that's original. I took the Oliver burner and connected the inlet holes, added a slide tube to control the air flow coming in from the sides. There are two ways to run this burner. Both with and without a blower, the blower adds enough heat to melt copper. For a non-ferrous foundry it works quit well. Some day I might try to melt something a little more challenging.
Pattern of the venturi. It needs some changes, so a wood pattern is a good
medium to work with, modifications are easy.
Looking down the rough casting, the center vane is air foil shape, this is one area
that needs change. After completing the burner , I decided it will need some changes.
But, more on that later.
All cleaned up and working. I need to get a different core making system, this took
to long to clean the casting.
All machined, the next one will be in aluminum, with some changes.
So, this is it. I wanted a fully adjustable burner, I got that, but found
out I don't need all the adjustments for the furnace. If I use this for a
forge I might need all of them. The arrow is to remind me of the flow,
just in case I stayed up to late.
The burner has a .035" orifice, using a 15lb regulator and a 60 cfm blower. After reading a lot of page about air flow and burners, this is a best guess as to what could work. The primary goal was to build a furnace/burner unit that will work for melting non-ferrous metals. So far it has worked. The one thing I like about this hobby is if you don't have one and can't buy one you can make one.

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