[TheForge] Kaowool vs Soft Fire Brick

[Bob]

     I have a plan in mind to build a naturally aspirated natural gas 
forge someday.
The design is soft firebrick with the edges angled to form a cylinder, 
surrounded
by kaowool with a thin sheet metal outside. The internal floor is 
probably hard
refractory board of some sort and the whole inside coated with ITC-100.
     I have natural gas in the shop at 15lbs PSI which I think will work.

Bob Willman
The Eagle's Anvil
Bowling Green, Ohio
WB8NQW

I know of no safe repository of the ultimate powers of our society but the people themselves;
and if we think them not enlightened enough to exercise their control with a wholesome discretion,
the remedy is not to take it from them, but to inform their discretion by education.

Thomas Jefferson

On 8/17/2016 7:58 PM, Daniel Kretchmar wrote:
> I have questions for the hivemind:
>
> I wish to build a new forced air forge.  My current plan is (starting from
> the outside)
> 1. A shell from a 40 lb propane tank
> 2. A layer of fitted soft brick with high temp mortar or a layer of kaowool
> 3. satanite
> 4. Itc-100
>
> Questions: Will softbrick insulate as well as kaowool?  Will soft brick be
> more durable when using borax for flux or will it melt just as easily?
>
> Suggestions are appreciated.
>
> Danr
> www.,irontreeworks.com
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