Melting glass with oxidation control and lowered emissions

Details Melting glass with oxidation control and lowered emissions Melting glass with oxidation control and lowered emissions

1990-06-25

1991-04-09

Lindsay, Robert L.

Glass manufacturing

Processes

Fining or homogenizing molten glass

65135, C03C 3087, C03B 504

Patent

active

050061445

ABSTRACT:
Premature dissociation of fining agent is avoided in a glass melting operation while controlling the final redox state of the product glass by initiating the melting process under relatively oxidizing conditions and subsequently altering the redox conditions to make the glass more reducing. A glass that is more reduced than usual can thereby be produced without sacrificing the ability to adequately fine the glass. For a given redox level, less fining agent need be used, thereby lowering emissions from the melting operation, because dissociation of the fining agent is delayed until a later stage of the process where the redox conditions are changed.

REFERENCES:
patent: 4634461 (1987-01-01), Demarest et al.
patent: 4919698 (1990-04-01), Knavish

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