System and method for recovery of salvageable ferrous and non-ferrous metal components from incinerated waste materials, and a selective crusher therefor
US4815667A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Nov 3, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S241/38
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention pertains to a system and a method for recovering salvageable ferrous and non-ferrous materials from incinerated waste materials including friable, carbonaceous incineration byproducts such as ash and associated ferrous and non-ferrous metal components. The system includes at least one crushing means for selectively comminuting friable material comprised of a rotating roll having at least one protrusion, preferably a weld extending transversely to the direction of rotation of roll, on its exterior cylindrical surfaces in spaced relation to a backing plate. The backing plate is urged toward the roll by a bias means exerted a preferably adjustable pressure sufficient to comminute the friable carbonaceous material to a desired size, and insufficient so as to permit the backing plate to retract and allow passage of ferrous and non-ferrous components in the waste material through the crushing means substantially uncomminuted. The bias means tends to rapidly urge the retracted backing plate to its set position and exert a selective comminution pressure through the retraction cycle. At last a first separating means coacts with the first crushing means for at least par…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.