C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
C03B 5/16 (2006.01) C03B 5/20 (2006.01) C03B 5/235 (2006.01)
Patent
CA 2062692
The invention relates to a process for melting solid glass forming ingredients in a regenerative or recuperative furnace having an upstream melting zone and a downstream fining zone comprising: a) introducing said solid glass forming ingredients into said upstream melting zone; b) heating said solid glass forming ingredients so that an interface of solid glass forming ingredients and molten glass is formed; c) providing heat sufficient to maintain the molten glass in the molten state through said downstream fining zone and sufficient to melt said solid glass forming ingredients, wherein at least a part of said heat is provided by at least one flame from at least one oxygen-fuel burner located on the roof of said furnace, the position of said at least one oxygen-fuel burner on the roof being such that the tip of its flame is directed approximately at the interface of said solid glass forming ingredients and said molten glass in an angle ranging from about 25° to about 90° whereby the melting rate for said solid glass forming ingredients is increased and, at the same time, said solid glass forming ingredients are substantially prevented from escaping the upstream melting zone.
Praxair Technology Inc.
Sim & Mcburney
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