Materials and methods for lining a chimney

Abstract

A method of relining a chimney includes: inserting a sleeve into a chimney; subsequently coating the sleeve with a flowable refractory material while the sleeve is positioned in the chimney. The flowable refractory material hardens on the sleeve to provide a refractory surface on the inner surface of the sleeve. The sleeve may be flexible or rigid, and may be lined with an insulating material. A high-temperature resistant fabric with an aluminum foil outer liner is preferred. The flowable refractory material may be a blend of inorganic materials and inert aggregates together with a high temperature resin bonding agent. The inert aggregates may include 50-80% Al 2 O 3 and 10-40% SiO 2 .

1 . A method of relining a chimney, comprising:
 (a) inserting a sleeve into a chimney;   (b) subsequently coating the sleeve with a flowable refractory material effective for hardening on the sleeve to provide a refractory surface on the inner surface of the sleeve; and   (c) allowing the flowable refractory material to harden to provide a hardened refractory surface on the inner surface of the sleeve.   
   
   
       2 . The method of  claim 1  wherein said sleeve is a flexible sleeve. 
   
   
       3 . The method of  claim 1  wherein said sleeve is made of a material capable of withstanding temperatures of at least 1800° F. 
   
   
       4 . The method of  claim 1  wherein said sleeve comprises a ceramic wool or ceramic paper material. 
   
   
       5 . The method of  claim 1  wherein said sleeve comprises a blend of high purity ceramic fibers comprising about 47% Al 2 O 3  and about 53% SiO 2 . 
   
   
       6 . The method of  claim 1  wherein said sleeve includes a foil outer backing. 
   
   
       7 . The method of  claim 1  wherein said sleeve is covered with a stainless steel mesh. 
   
   
       8 . The method of  claim 1  wherein said flowable refractory material comprises a blend of inorganic materials and inert aggregates together with a high temperature resin bonding agent. 
   
   
       9 . The method of  claim 8  wherein said flowable refractory material comprises 50-80% Al 2 O 3  and 10-40% SiO 2 . 
   
   
       10 . The method of  claim 1  wherein the flowable refractory material is applied by a conical applicator. 
   
   
       11 . A method of lining a chimney, comprising:
 (a) inserting a sleeve into a chimney, said sleeve comprising:
 i) a ceramic paper layer having a thickness of about ⅛″ to about ¼″; and 
 ii) a foil backing layer having a temperature resistance up to at least 300° F.; 
   (b) subsequently coating the sleeve with a flowable refractory material effective for hardening on the sleeve to provide a refractory surface on the inner surface of the sleeve, wherein said flowable refractory material comprises 60-80% Al 2 O 3  and 40-20% SiO 2 ; and   (c) allowing the flowable refractory material to harden to provide a hardened refractory surface on the inner surface of the sleeve.