Method and apparatus for the treatment and recovery of mineral fiber or glass waste
AssigneeIsover Saint-Gobain
InventorsRoger Deblock, Petrus J. H. D. Bakx
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Abstract
The present invention relates to a method of treating waste comprising introducing a glass or mineral fiber substrate (7) contaminated with organic materials into the chamber (1) of a furnace by means of a conveyor belt (4), subjecting it to a gas consisting of a neutral gas and between 0 and 10% by volume of oxygen, heated to a temperature below the melting temperature of the waste substrate in order to pyrolyze the organic materials, and recovering the waste substrate. This method has particular application to the recovery of the vitreous material forming the waste substrate, in order to recycle it for use in a glass melting furnace.
Claims16
A method for treating a mineral fiber substrate contaminated with at least one organic substance in a furnace, comprising:
- (a) subjecting said substrate to a hot gaseous mixture comprising nitrogen, combustion gases and up to 10% by volume of oxygen,
- (b) recovering said substrate, wherein at least 85 wt. % of said organic substance is pyrolyzed, and
- (c) recovering said hot gaseous mixture at a temperature of at least 350.degree. C.
Dependencies are inferred from the claim text.