Kemp_l

Sorry about the delay in messaging back. Computer needed some work and a tuneup. But i am back and getting ready to get after the build. After looking at the ribbon burner I think that may be my setup. Thank you wayne for the post. I went to your site and if ok will be calling or emailing you with an order soon.

On 7/28/2010 at 4:46 PM, welder19 said:

Definately leave out the portland.
Use a high temp clay, I prefer Kaolin, which runs $10-$15 for 50lb, use silica sand or grog, approx 20lbs grog/sand to 50lb of clay, to reduce shrinkage and add strength and if you want it to be insilated add in some foam beads, bean bag chair filling works good, add as much foam as your mix will allow and still hold together, add water very little at a time and mix well. Then do 1/4"-1/2" hot face, [clay mix with no foam in it].
Let it dry slow and then fire it slowly, if you fire it too fast it will crumble.
It will handle 3000F with no problem.
I use this mix for my forges and casting furnaces.

welder19

sorry about the message in an old thread.But this is exactly what I think I need. <<<>>> Has anyone made this formula in the 5yrs, and how did it work. Where else can I get bead foam? For the hot face do you let the first part dry then press on the half inch hot face and let it air dry? How thick should the first wall be? After it is cured and sure it is, can a person paint the inner face with itc-100.

ITC-100HT Ceramic Coating for Refractories. Is there something like the itc-100 that is cheaper to use? 

I want to make a forge with the portland cement, sand, Perlite, and clay. But I was thinking the the itc 

would protect the cement from the heat. Problem is 100 bucks or so cost. Is there a cheaper option for

reflecting heat from the concrete?