Poured refractory.....

C

cgdavid

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Sep 12, 2005
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I remember seeing a 'recipe' for poured refractory using (if I remember correctly) satanite with perlite as a filler. Since the search engine is off-line, does anyone know if I'm remembering things right and if so what the recipe/procedure is?

Guess while I'm asking... how deep do you put the nozzle of the torch into the refractory from the outside?? Guessing that the metal should not be exposed to the interior at all for obvious reasons.... aka liquid nozzle on the forge floor....

BTW

I found an old garden sprayer made of stainless. Plan on using this as an outside tube for the forge and cast it with about a 3"dia hole on the middle with a groove in the bottom for hard fire brick
 
You can purchase refractory cement in powder form from your local masonry supply. One hundred lb bag is what I purchased. You will want to coat the inside of the cement surface with a reflective coating, otherwise your forge will take forever to heat up. Fred
 
The burner nozzle does not go into,or particularly near,the forge chamber.The burner tube goes in through the shell and lining.The nozzle fits in the burner tube.It is usually 6" to 10" away from the chamber.The burner tube is shaped to end at the refractory wall evenly.Check out IG's or any other forge tutorial for a good idea of how this works.For a small forge like you are building,I think you would do better with just Ka-wool, ITC, and satanite.You will still have to line the chamber walls with it on a poured forge,or you will be heating the forge ,not the knife.
 
My forge is a sphere 8" in diameter 1" thick cast refractory shell. Takes about 30 min to welding heat at about 1 1/2 psi. I can weld 25 lbs of steel at a time. The burner nozzel is tapered to fit against the 1" diameter hole in the shell.
Del
www.ealyknives.com
ps i cast my own shells
 
this is an old recipe from a potter site. Potters have been building kilns for years.

3 parts premixed cement, 3 parts fire clay, two parts pearlite
 
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