Process and apparatus for vitrification of hazardous waste materials
US6620092B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2001 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | May 11, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/50
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for vitrifying waste material containing environmentally hazardous metals or metal compounds includes drying a waste material using a flash dryer, where the drying is carried out at a temperature low enough to prevent volatilization of hazardous metals and metal compounds contained in the waste material. Preferably, more than about 95% of the water is removed form the waste material. The dried waste material is transferred from the flash dryer into a melting vessel, melted, collected and cooled to form a vitrified mass of waste material. Gases produced during the process of the invention are filtered, treated, and released into the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.