My latest project. Gingery horizontal mill

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madjackghengis:
Hi Gadget, that video looks good, judging from the flame coming out the top, you've got lots of flame in with the crucible. After reading your posts, I got motivated and found the old paint gun I have, then I remembered an old oil burner I bought at the scrap yard for a couple dollars, probably twelve or fifteen years ago, and never did anything with. I dug it out, checked the wiring for safety reasons, put a tube in the inlet side of the pump, and plugged it in. I pumped about a cup of diesel on the floor of the shop before I pulled the plug, and noted it all came out of the return to tank fitting, with no sign of wetness around the jet. I took out the orifice, took it apart and used a coleman lantern wire to open the plugged orifice, put another piece of plastic line from the tank return to the tank sitting above the unit, and tried it again.

As you can see, the unit just needed un-plugging the orifice and it worked. I don't know how much heat it puts out, but it's substantial, and I'm going to have to play with tubes and tuyeres to see how they affect it, and of course, I will have to try it out with waste oil and various mixes, however you've got me on a roll, and I'm going to get this going this summer, and be casting by winter, or I'm changing my profession :bugeye: You said you didn't get much effect at all out of changing the adjustment of the needle on your sprayer, I'm looking at this oil pump, and I see it as a matter of controlling the pressure as the primary means of controlling fuel flow. I suspect if I put a needle in the fuel return line, I will materially affect how much pressure is at the orifice, and be able to control the fuel supply. I reckon I'll see. Thanks much for putting me on this track, I've been waiting too long, and need to get it going. :bow: mad jack

Gadget:
From what I've read, you will need a siphon nozzle to use the fuel oil burner to work properly. You will also need to preheat the oil. At least that's what I have read.
Glad to see you have a burner working. With the proper setup, it will be better than what I have.
Dan

madjackghengis:
Hi Gadget, thanks for the information, I noticed a bit of spray residue of diesel around the nozzle area after burning, and figured it needed a thicker fuel, and I've read other places about warming the fuel. I'll fool around with it while I get the furnace rammed up and together, and I can probably come up with a proper density for the size orifice. I tried holding a piece of inch and three quarter exhaust pipe about eight inches long in front of the flame, and got excess fuel sprayed inside the tube. Then I tried a piece of two inch pipe with less fuel left inside, so I think it needs a bit more air, but that may work its self out with waste oil instead of diesel. I guess it's time to mix up all that sand, clay, crushed brick, and get it wet, so it can set a while before ramming.
It looks in your video, like you've got the burner going straight into the furnace, are you getting good circulation of flame around the crucible that way? Are you making your own crucibles, or buying them? I plan on buying the Gingery book on crucibles, as I've got some bronze I want to cast and don't want to spend the money of crucibles melting different metals. That flame coming out the top looks good, motivating to see it ready and hot :jaw:mad jack

Gadget:
MadJack,
I do have the burner going straight in and it can be a problem. This furnace was originally an electric furnace I built from Gingery plans about twenty years ago. The burner element burned out and I decided to convert it to propane. The only way to cut a burner opening was to use the hole left by the burner element which went straight in. After I get the next two needed castings poured I think I will try to change the angle of the burner. Hope I don't ruin the furnace in the process.
Dan

madjackghengis:
Hi Dan, I finally found my copy of the Gingery gas fired furnace, and I have the forms cut out of a thirty or forty gallon drum, I just need to make the inside forms, and break up some brick. I have the clay, the sand, and brick, I just haven't broken it up. Once I do, it's a matter of ramming it up, letting it dry, and firing it, I will set it up with the tangential inlet, but I want to get the size of the pipe going in, right the first time, so I'm playing with pipe, burner, and will be mixing fuel as well, see what we get with old oil instead of diesel fuel. I think I'm going to have to put a "T" in the inlet and put some air in on top of what is coming out of the burner setup, as there is excess fuel as it goes right now, but that might be the diesel being thin. Once I mix all my refractory, it should sit a few days before I ram it, and since there's no hurry, it might as well get the best treatment, no rush. I'll try to get some movie footage of the burner as I change things, I've got the movie part of my camera figured out, at least the start of it. :headbang: mad jack

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