The Shop > Metal Stuff
Dual Fuel Gingery Type Furnace
inthesticks:
Hello everyone. That seems to be in agreement with what I have read SHIPTO.
Finished the burner port and mount today. The first pic. shows the assemblies ready to install and a 1 1/4" burner pipe to verify clearances. This represents the largest burner I plan to use. The 2nd pic. is the port extention installed. The 3rd pic is the burner adjustment spud (thats what I call it, may not be correct term) bolted in place. 4th pic. is burner pipe in operating position. The last pic. is the burner pipe pushed all the way in to check side wall clearance. Refractory will be 3.5" thick, so the 4" I measured is just about right taking into consideration the burner flare. The burner spud will also allow 10* of adjustment in any direction up, down or sideways.
Cheers All :beer:
CB
SwarfnStuff:
At the moment it's all experimental with the refractory mix. Basically I'm making plinth blocks to test.
Today I tried a 5 parts perlite to 1 part Mortar. A few days to dry out and I shall hit it with the torch and see what happens. The 4:1 mix seemed to take the torch ok.
I do have thoughts of some form of hot face perhaps with clay or might start with straight hi temp mortar. BUT, that's way down the track. The more I read on the web the more confusing it seems.
John B
nrml:
what you are building looks more substantial than the average trashcan forge. Why not spend a bit on ceramic fibre insulation and have the ability to melt cast iron if you want to. Ironman has demonstrated that this is definitely possible.
inthesticks:
I agree John B there is alot of confusing and contradictory information out there. Pearlite, concrete morter and vermiculite seem to be ok for aluminum but breakdown into fluxes at higher temps. which will damage your crucibles your furnace lining and effect your melt. Years ago I operated the power plant at Orenda Aerospace in Mississauga, when the plant was decomissioned I got 2 1/2 boxes of A P Green's G-26 insulating firebrick heavily used in industry. I will be installing this in the bottom 2 sections with a 1" high alumina hotface. The top will recieve a castable insulating refractory with a hotface. Some of these products are quite expensive. For a small furnace occasionally melting lower temp. metals I would go with the less expensive options too.
I have lots of fine sand and white clay on my property. I want to try this material for my green sand and once I test the refractory properties of the clay maybe evan as a refractory.
Cheers
CB
inthesticks:
I agree NRML mineral wool is a fantastic material however I would hate to waste 2 1/2 boxes of high quality industry proven insulating firebrick. See above post.
Cheers
CB
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