Electric furnace for melting glass
AssigneeSaint-Gobain Vitrage International
InventorsJose A. C. Muniz, Luis G. Goicoechea, Maurice Lemaille
Life of this patent
Estimating the term…
Abstract
The device for melting glass includes a compartment 1 for melting with a discharge throat 11 defined on top by a mobile carrier 16 having an upper part 18 extending upward above the level of glass and a lower part 17 intended to be totally immersed in the molten glass. Faces of the lower part are formed of a metal or an alloy of metals resistant to corrosion by the molten glass.
Claims21
A furnace for electric melting of vitrifiable materials, comprising:
- a compartment having an approximately horizontal floor and an outlet;
- an electric heating device positioned for heating and melting glass in said compartment, the molten glass including a supernatant composition;
- and
- an immersed throat at the outlet for removing the melted glass,
- wherein at least an upper part of the throat is defined by a mobile barrier having an upper part extending upward up to a level higher than that of the supernatant composition and a lower part constructed so as to be totally immersed in the molten glass, said lower part comprising at least two plates having metallic faces resistant to corrosion by molten glass,
- wherein said at least two plates of said lower part of the barrier partially laterally overlap with sufficient clearance to absorb thermal expansion of the barrier.
A furnace for electric melting of vitrifiable materials, comprising:
- a compartment having an approximately horizontal floor and an outlet;
- an electric heating device positioned for heating and melting glass in said compartment, the molten glass including a supernatant composition;
- and
- an immersed throat at the outlet for removing the melted glass,
- wherein at least an upper part-of the throat is defined by a mobile barrier having an upper part extending upward up to a level higher than that of the supernatant composition and a lower part constructed so as to be totally immersed in the molten glass, said lower part comprising at least one plate having metallic faces resistant to corrosion by molten glass,
- wherein the upper part of the barrier comprises at least two superposed, parallel, U-shaped cooling tubes external to said at least one plate and having horizontal bases extending to said lower part of the barrier so as to cover and reinforce said at least one plate.
A furnace for electric melting of vitrifiable materials, comprising:
- a compartment having an approximately horizontal floor and an outlet;
- an electric heating device positioned for heating and melting glass in said compartment, the molten glass including a supernatant composition;
- and
- an immersed throat at the outlet for removing the melted glass,
- wherein at least an upper part of the throat is defined by a mobile barrier having an upper part extending upward up to a level higher than that of the supernatant composition and a lower part constructed so as to be totally immersed in the molten glass, said lower part comprising two lateral cylinders and at least one plate extending between said lateral cylinders, wherein lower ends of said lateral cylinders extend below a lower end of said at least one plate such that the lower ends of said lateral cylinders rest on a lower face of said throat to define a height for passage of molten glass between the lower end of said at least one plate and the lower face of said throat.
Dependencies are inferred from the claim text.