Glass manufacturing – Processes – Fining or homogenizing molten glass
Reexamination Certificate
2007-11-20
2007-11-20
Halpern, Mark (Department: 1731)
Glass manufacturing
Processes
Fining or homogenizing molten glass
C065S134600, C065S091000, C065SDIG016
Reexamination Certificate
active
10433695
ABSTRACT:
When waste glass that is strongly laden with organic impurities is melted, the organic constituents present in the melt give rise to so-called “black hearts” which can no longer be eliminated in a subsequent refining process, thus impairing the quality of the glass. According to the invention, gas nozzles for introducing oxygen are installed in the area of the inlet opening of a melting unit thermally connected to a combustion chamber. This allows a targeted oxidation of the organic constituents, which are then exhausted in the form of exhaust gas. With the invention, even highly contaminated waste glass such as, for instance, glass fibers, can be returned to the production process.
REFERENCES:
patent: 5548611 (1996-08-01), Cusick et al.
patent: 5599182 (1997-02-01), Andrews et al.
Connolly Bove Lodge & Hutz
Halpern Mark
Messer Griesheim GmbH
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