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In an industrial glass furnace which contains recuperators, regenerators, electric boost or other devices for providing heat to glass batch material an oxy-fuel burner mounted in the roof of the furnace provides additional heat to melt the batch material. A method of mounting and using such a roof-m

In an industrial glass furnace which contains recuperators, regenerators, electric boost or other devices for providing heat to glass batch material an oxy-fuel burner mounted in the roof of the furnace provides additional heat to melt the batch material. A method of mounting and using such a roof-mounted oxy-fuel burner including the operating parameters to maximize heat transfer while minimizing the disturbance of the batch material is disclosed.

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In an industrial glass furnace which contains recuperators, regenerators, electric boost or other devices for providing heat to glass batch material an oxy-fuel burner mounted in the roof of the furnace provides additional heat to melt the batch material. A method of mounting and using such a roof-m

In an industrial glass furnace which contains recuperators, regenerators, electric boost or other devices for providing heat to glass batch material an oxy-fuel burner mounted in the roof of the furnace provides additional heat to melt the batch material. A method of mounting and using such a roof-mounted oxy-fuel burner including the operating parameters to maximize heat transfer while minimizing the disturbance of the batch material is disclosed. at least one charger above the glass forming material. 13. The method of claim 1 wherein the burner is mounted substantially perpendicular to the surface of the glass forming material. 14. The method of claim 13 wherein the burner is mounted up to 45 degrees away from the perpendicular and toward the downstream front wall of the furnace. 15. The method of claim 13 wherein the burner is mounted not more than 10 degrees from the perpendicular and toward the downstream front wall of the furnace. 16. The method of claim 1 wherein the oxidant is selected from the group consisting of oxygen-enriched air, non-pure oxygen and "industrially" pure oxygen. 17. The method of claim 1, including staging the flow of fuel from the oxy-fuel burner. 18. The method of claim 1 wherein the fuel is a gas selected from the group consisting of methane, natural gas, liquefied natural gas, propane, liquefied propane gas, butane, low BTU gases, town gas, producer gas and mixtures thereof. 19. The method of claim 1 wherein the fuel is a liquid selected from the group consisting of heavy fuel oil, medium fuel oil, light fuel oil, kerosene and diesel. 20. The method of claim 1 wherein at least one oxy-fuel burner is provided in the roof proximate the downstream front wall. 21. The method of claim 1 wherein the glass forming material comprises material selected from the group consisting of cullet, silica, feldspar, nepheline syenite, limestone, dolomite, soda ash, potash, borax, kaolin clay, alumina, arsenic, antimony, sulfates, sulfides, carbon, barium oxide, strontium oxide, zirconium oxide, lead oxide, color forming metal oxides, and mixtures thereof. 22. The method of claim 1 including providing all furnace burners as oxy-fuel burners. 23. The method of claim 1 including providing all furnace burners as roof mounted burners. 24. A method of melting glass forming material in a glass melting furnace, said furnace having a back wall, breastwalls above sidewalls, and a downstream front wall connected to a roof, wherein at least one batch charger for charging glass forming batch material is contained in at least one of the back wall and the sidewall, comprising: providing at least one oxy-fuel burner in the roof of said furnace over said batch material, wherein said at least one oxy-fuel burner is adapted for staged combustion; providing a flow of fuel to said at least one oxy-fuel burner; providing a flow of gaseous oxidant in association with said at least one oxy-fuel burner; injecting the fuel and the oxidant into the furnace; and, combusting said fuel from at least said one oxy-fuel burner such that at least a portion of combustion is effected in the vicinity of said glass forming material to enhance convective and radiative transfer of heat to said glass forming material without substantially disturbing said glass forming material; including operating at least one said roof mounted oxy-fuel burner in a fuel rich mode and at least one said roof mounted oxy-fuel burner in a fuel lean mode. 25. A method of melting glass forming material in a glass melting furnace, said furnace having a back wall, breastwalls above sidewalls, and a downstream front wall connected to a roof, wherein at least one batch charger for charging glass forming batch material is contained in at least one of the back wall and the sidewall, comprising: providing at least one oxy-fuel burner in the roof of said furnace over said batch material; providing a flow of liquid fuel to said at least one oxy-fuel burner; providing a flow of gaseous oxidant in association with said at least one oxy-fuel burner; injecting the fuel and the gaseous oxidant into the furnace; combusting said fuel and, controlling the velocity of the flow of fuel and oxidant to prevent disturbance and entrainment of said batch material while maintaining convective heat transfer to said batch material. 26. The method of claim 25 wherein the liquid fuel is selected from the group consisting of heavy