Method and device for melting and refining materials capable of being vitrified
AssigneeSaint-Gobain Glass France
InventorsPierre Jeanvoine, Tanguy Massart, Anne Berthereau
Life of this patent
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Abstract
A process for melting and refining vitrifiable materials. In this method all or part of the thermal energy necessary for melting the vitrifiable materials is supplied by the combustion of fossil fuel with at least one oxidizer gas, the fuel, gas or the gaseous products resulting from their combustion are injected below the level of the mass of the vitrifiable materials. The refining of the vitrifiable materials after melting includes at least the step of subjecting them to subatmospheric pressure.
Claims20
Process for melting and refining vitrifiable materials, wherein substantially all of the thermal energy necessary for melting the vitrifiable materials is supplied by the combustion of fuel with at least one oxidizer gas, the fuel/gas or the gaseous products resulting from the combustion being injected below the surface level of the mass of vitrifiable materials, and wherein the refining of the vitrifiable materials after melting comprises at least one step of subjecting them to subatmospheric pressure, wherein the refining operation is carried out on the molten vitrifiable materials in a foamy state, having a density of approximately 0.5 to 2 g/cm3.
A process for melting and refining vitrifiable materials, comprising the steps of:
- melting the vitrifiable materials by combusting a fuel with at least one oxidizing gas injected below the surface level of the mass of the vitrifiable materials, such that the molten vitrifiable materials are in a foamy state and have a density of approximately 0.5 to 2 g/cm3 and a sulphate content of no more than 100 ppm;
- and
- refining the melted vitrifiable materials, said refining step including subjecting the melted vitrifiable materials to sub-atmospheric pressure.
Process for melting and refining vitrifiable materials containing solid combustible elements, wherein at least part of the thermal energy necessary for melting the vitrifiable materials is supplied by the combustion of fuel with at least one oxidizer gas, the fuel/gas or the gaseous products resulting from the combustion being injected below the surface level of the mass of vitrifiable materials, and the refining of the vitrifiable materials after melting comprises at least one step of subjecting them to subatmospheric pressure, wherein the refining operation is carried out on the molten vitrifiable materials in a foamy state, having a density of approximately 0.5 to 2 g/cm3.
Dependencies are inferred from the claim text.