Dave Finkelnburg on sun 19 aug 01
Faye,
Any of the products you mentioned will work. "continuous" duty is
approaching
24 hours a day, year round. Chemical plants and the like. For a kiln, all
the products will work because they are only exposed to about 2,000+ degrees
for a few hours a year.
However, almost all shrink. You probably should ask about that, and how
much, and figure that into what you want to do.
Also, consider whether you want to use ITC on the fiber. A rigidizer
like sodium silicate might be sufficient.
I had to buy a box to get any blanket insulation. Then I found a
supplier who had scraps of ceramic board insulation. You might ask,
explaining how many square feet you need. This darn stuff isn't cheap!
Good luck with your kiln insulation,
Dave Finkelnburg
>-----Original Message-----
>From: Fabienne Micheline Cassman
>>I have decide to put fiber on the inside of the kiln lid for added
>>insulation. However, I am faced with an unresolved issue. Which type to
>>get? Everyone says ThermalCeramics' Kaowool, but when I looked it up, it
>>just doesn't cut it as the continuous use limit is 2000oF. I will fire to
>>cone 9 which is well above that. I have a couple of alternative, but both
>>pose a problem. For the first, I don't have an answer and for the second,
>>I can't find a supplier.
>>
>>1- There are two "classes" of fibers out there, so to speak. Those listed
>>at 2300oF/1260oC and those listed at 2600oF/1425oC. The 2300 type is
>>typically listed as stable around 2150oF when fired continuously at that
>>temperature. The products that fall under that category are Unifrax's
>>Fiberfrax Duraboard 2300 or Durablanket 2300, OR ThermalCeramics'
>>Cerablanket, OR APGreen's Insboard 2300, OR finally Superwool 607 MAX.
>>
>>Now, would spraying any of these lower stability products with ITC
increase
>>their performace? Anyone with opinions and/or experience with this?
>>
>>2- The second type is the 2600 type which is stable well above that and
>>includes the following products: Unifrax's Fiberfrax Duraboard 2600 or
>>Durablanket 2600, OR ThermalCeramics' Cerachem, OR APGreen's Insboard
>>2600. I am having a hard time finding these products in small quantity
>>though; everyone wants to sell me at least a whole box or roll. My local
>>supplier doesn't carry fiber. Who carries some and is willing to sell it
>>in small quantity? Should I bother spraying it with ITC if just to keep
it
>>together better?
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