Method for recycling asphalt material
US6290152A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | May 27, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C2019/1095
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An asphalt based material recycling system and method is used to recycle asphalt materials, such as asphalt shingles and tar paper that include granules, fibers or other particles. The asphalt material is simultaneously heated and milled in a heated milling apparatus, such as a heated ball mill, to reduce the asphalt material including granules to a fine mesh in suspension in liquid asphalt. Excess moisture is removed from the asphalt material being recycled by continuously venting the heated milling apparatus. The heated milling apparatus preferably includes a rotatable milling vessel rotated at an acute angle with respect to the horizontal plane and having an opening that provides continuous venting. The shape of the milling vessel allows the liquid level inside the milling vessel to have a liquid head above the outlet region of the milling vessel, for facilitating milling. The rotatable milling vessel includes a plurality of mixing members, such as rods or paddles, extending from an interior surface to enhance milling and to pull the asphalt material being recycled under and into the liquid slurry. The asphalt material recycling system further includes a filter apparatus for fil…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.