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US 8,919,681 B1Granted
Method for progressive separation and extraction of raw materials from residential roofing products
OwnerJonathon Daniel Horton, Alan Clarkeinventors
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Abstract
This invention relates to a progressive method of separating and extracting raw materials from residential roofing products for re-use as ingredients for asphalt and fiberglass related products, including roofing materials. The method includes reduction, separation and then extraction of raw materials. The resulting products are alternative roofing granules, asphalt coated limestone, limestone, recycled asphalt and recycled fiberglass strand powders.
Claims14
A method of progressively separating and extracting raw materials from residential roofing products, the method comprising:
- a) mechanically reducing the size of the residential roofing products to produce chip products;
- b) screening the chip products to separate the chip products by size into large, medium, and small aggregate products, wherein the large aggregate products are comprised of asphalt-coated fiberglass chips, the medium aggregate products are comprised of asphalt coated granules, and the small aggregate products are comprised of asphalt coated limestone powder;
- c) extracting raw materials from the large, medium, and small aggregate products, by the following steps:
- i. performing extraction on the large aggregate products, wherein the extraction results in the formation of calcium carbonate, fiberglass strands and powder, roofing granules, and liquid asphalt;
- and
- ii. separating the medium aggregate products by density, wherein the density separation results in the formation of reusable clean granules, reusable middling powder, and asphalt coated limestone powder.
3 more elements
Dependencies are inferred from the claim text.