Refractory lined ducts and coating for use therewith
OwnerVictor M. Davis, Matthew S. Davisinventors
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Abstract
The present invention is directed to ceramic fiber insulation and related products and methods. A coating that is capable of being brushed and/or sprayed lightly as a liquid onto vacuum-formed ceramic fiber insulation for use at high temperatures is also provided.
Claims13
A method of increasing fire resistance, erosion resistance, and corrosion resistance of a duct lined with a vacuum-formed ceramic fiber lining comprising treating said ceramic fiber lining with a coating, wherein said coating renders said duct capable of being used at temperatures from about 2300° F. to about 3000° F.
A ceramic fiber lined duct comprising a vacuum-formed ceramic fiber liner that has been treated with a coating affixed to a metal jacket.
A method of making refractory lined ducts having an elongated, structurally supporting tube and a ceramic fiber liner carried on an interior wall of the duct comprising:
- a) forming a sleeve and binder materials on a structurally supportive die in a hydrated state by vacuum-forming wherein said sleeve has an external wall of a configuration that is geometrically and dimensionally complemental to the interior wall of the supporting duct to form an interference fit therewith effective in mechanically retaining said sleeve and duct in fixed interengagement;
- b) inserting the sleeve, while in a hydrated state and on the die, coaxially into the supporting tube and after insertion, removing the die from the sleeve;
- and
- c) drying the sleeve while said sleeve is maintained in fixed position within the supporting tube to remove substantially all liquid resulting in solidification of the sleeve in a frictionally and adhesively retained relationship with the supporting tube.
Dependencies are inferred from the claim text.