Reduction of nitrogen containing glass batch materials using excess oxygen
AssigneeCorning Incorporated
InventorsJohn T. Brown, Arlene K. McMahon
Life of this patent
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Abstract
A method for decreasing the amount of nitrogen and oxygen containing compounds employed in glass batch mixtures. Oxygen fuel burners are utilized to provide an oxidizing atmosphere to the molten glass in the place of the reduced or eliminated nitrogen and oxygen containing compounds.
Claims20
A method for reducing the amount of nitrate containing compounds in a batch for a glass making process normally employing such nitrate containing compounds in a batch, comprising:
- employing, in a furnace used to melt glass, an amount of a nitrate containing compound in said glass batch which is less than the amount of nitrate containing compound normally utilized in said batch;
- and
- adding excess oxygen into said furnace in an amount which is sufficient to replace at least some of the oxidizing effect which would otherwise be lost by said employing less nitrate step.
A method for making a lead containing glass comprising:
- employing a glass batch comprising up to about 70 weight percent lead and less than about 3 weight percent niter in a glass melting furnace having a furnace length;
- and
- utilizing at least three volume percent excess oxygen in said furnace to melt said glass.
A method for reducing the amount of nitrate containing compounds in a batch for a lead-containing glass making process normally employing such nitrate containing compounds in a batch, comprising:
- employing, in a furnace used to melt lead-containing glass, an amount of a nitrate containing compound in said glass batch which is less than the amount of nitrate containing compound normally utilized in said lead-containing batch;
- and
- adding excess oxygen into said furnace in an amount which is sufficient to replace at least some of the oxidizing effect which would otherwise be lost by said employing less nitrate step.
A method for reducing the amount of nitrate containing compounds in a batch for a CRT neck, funnel, or face plate panel glass making process normally employing such nitrate containing compounds in said batch, comprising:
- employing, in a furnace used to melt CRT neck, funnel, or face plate panel glass, an amount of a nitrate containing compound in said glass batch which is less than the amount of nitrate containing compound normally utilized in said batch;
- and
- adding excess oxygen into said furnace in an amount which is sufficient to replace at least some of the oxidizing effect which would otherwise be lost by said employing less nitrate step.
Dependencies are inferred from the claim text.