Method for producing glass with lower alkali content

Details Method for producing glass with lower alkali content Method for producing glass with lower alkali content

1994-05-16

1996-12-24

Hoffmann, John M.

Glass manufacturing

Processes

Fining or homogenizing molten glass

651344, 651345, 651354, C03B 518, C03B 5225

Patent

active

055869998

ABSTRACT:
A method for producing lower alkali glass wherein fluxing activity provided by alkali oxides is partly replaced by fluxing activity provided by water in the glassmaking process. Water is effectively and efficiently provided to the glass by the establishment of a high water vapor concentration in the glassmelting zone atmosphere which is produced by a defined heat-generating oxygen-based combustion reducing nitrogen presence and boosting the water vapor concentration, and maintained in the glass by passing molten glass through successive refining and forehearth zones having atmospheres with high water vapor concentrations.

REFERENCES:
patent: 3337324 (1967-08-01), Cable, Jr. et al.
patent: 3617231 (1971-11-01), Fenstermacher et al.
patent: 3960532 (1976-06-01), Lazet
patent: 4061487 (1977-12-01), Kiyonaga
patent: 4185984 (1980-01-01), Kiyonaga
patent: 4473388 (1984-09-01), Lauwers
patent: 4545800 (1985-10-01), Won et al.
patent: 4617042 (1986-10-01), Stickler
patent: 4973346 (1990-11-01), Kobayashi

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