The Shop > Metal Stuff
Sawed off cupola
vtsteam:
3 inches of rain overnight. Yuck. Rained off and on today. But I managed to quickly set up the new oil burner for a couple tests.
Here's the burner end on. You can see the orifice. Behind it is a mig tip jet that supplies compressed air at 30 psi:
vtsteam:
Here it is quickly set up very temporarily to test. Rainwater everywhere!
Performance with kerosene (paraffin) was pretty impressive. With waste oil, inadequate. Mixed, the burner ran okay, but I wasn't happy with the heat output for melting iron using any proportion of waste oil. Feed rate definitely slowed with viscosity. I'm not sure what the exact problem is, because videos of the Kwiky burner do better on oil than mine did. Will have to figure that out.
vtsteam:
Solved the waste oil problem. I had a really good test burn this afternoon with a lot of heat produced.
The change I made was to increase the taper at the back side of the pipe plug used in the Kwiky burner. I did this with a 60 degree countersink.
The pipe plug I was using may have been different than the Kwiky's designer. I believe his had a counterbored recess at the back of the plug, as purchased. Mine was solid.
I did counterbore slightly, anticipating the difference. But performance was greatly improved after countersinking it and going as deep as the diameter of the plug allowed. This new smooth taper really increased flow through the nozzle, as well as vaporizing the oil more fully.
Here is a link to the Kwiky burner instructions:
http://metalshop.homestead.com/How-to-Build-The-Kwiky-all-Fuel-Foundry-Burner.html
My rig is pretty temporary at present. I need to work on a small oil leak that drips back along the underside of the burner housing, and build a shutter to control the blower airflow, as well as fasten the whole burner in more permanently and caulk with lining mix.
But it looks quite hopeful for waste oil and melting iron!
awemawson:
Well done :beer: :beer: :beer:
We demand PICTURES of that beast burning :ddb:
vtsteam:
Thanks awemawson!
It's hard to tell from a photo, so I took a video.
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