Forehearth for glass furnace
US4069032A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1977 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Feb 25, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B7/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A forehearth for a glass furnace includes a roof having a plurality of longitudinal ridges depending therefrom. These define a central longitudinal channel lengthwise of which a current of cooling air flows between inlet and outlet ports to cool the central, hottest portion of the stream of glass in the forehearth, and side channels which serve to reheat the side portions of the stream of glass. A plurality of longitudinally spaced electrodes are suspended from the portions of the roof over the side channels and are inserted in the molten glass to directly heat the side portions. Advantageously the electrodes in one side channel are energized in pairs independently of the electrodes in the other side channel. Preferably the electrode assemblies are mounted in apertures extending through the roof. Molybdenum electrodes with air cooled tubular holders encircled by refractory tubes and isolated from ambient air are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.