Method of selectively separating glass from waste material
US4116822A · kind A · utility
16Cited by
12References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1976 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Jun 30, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S209/93
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Separation of glass from waste material by high tension techniques. The waste is sized to a range from 1/8 to 1 1/2 inches, dried to a moisture content less than 2%, air classified to remove low bulk density material, and subjected to magnetic separation to remove ferrous metal. The waste is then fed to the top of a rotating grounded drum and subjected successively to ion bombardment from corona discharge electrodes and to an electrostatic field from a static electrode. The glass remains pinned to the roll while other materials come off in the static field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.