Process for vitrifying residues from flue gas cleaning
US5848960A · kind A · utility
3Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Jan 23, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09B3/29
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
To vitrify chlorine-containing residues from flue gas cleaning, in particular filter dust and residues from the flue gas scrubber, the residues are melted in a melting furnace (8) and then discharged. To condition the melt, alkali-containing fluxes are added in the form of an oxide, hydroxide or carbonate, the stoichiometric ratio between the total alkalis and the chlorine being greater than 0.75, preferably greater than 1. Particularly suitable compounds in this process are oxides, hydroxides or carbonates of sodium or of potassium, or a mixture of such substances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.