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- Aug 16, 2013
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Yep- but how do you control the temperature?
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I had to think about this for a bit and I could be out to lunch so if anyone wants to step up please feel free. Theres no thermostat of any kind on the furnace so I guess dont control the temperature at all. The propane burns at 3623F (1995C) and the aluminum melts at around 1240F (660C) all I have control over is the volume of heat going into the furnace. Im not sure on the math needed to calculate the BTU of a burner but found a link that does it. (http://adamziegler.com/foundry/prop...5&coef=0.77&time=60&btu=2490&air=23.86&xair=5)
Using that the Reil style Burner I have been using should preform something like thisThough the numbers dont look right to me)
8 oz. = 11634 BTU's
2 lb = 23269 BTU's
6 lb = 40303 BTU's
I cleaned up the garage yesterday and cant for the life of me remember where I put the flare for the burner scratch.gif so I just but an oversized union fitting over the end.
In the video I start the burner at 1/2lb about the same as a gas BBQ regulator and you can see the flame would be ok for roasting one marshmallow at a time but not much more.
I then turn the pressure up to 2psi and open the choke. This is the setting I start with to warm the furnace, crucible and all the tools Ill be using.
Around the 35 second mark I turn the pressure up to 6psi. This is where I normally run the furnace. At this setting I can melt a full crucible of aluminum in less than 10 minutes and it will use around 1 pound of propane per hour. Hope that helps.
[ame]https://www.youtube.com/watch?v=tzBGJ8y1WO8[/ame]