Preparation of silicate or glass in a furnace with burners immersed in a reducing medium
AssigneeSaint-Gobain Glass France
InventorsRemi Jacques, Pierre Jeanvoine, Biagio Palmieri, Melanie Rattier
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Abstract
The invention relates to a process for preparing a silicate of an element chosen from alkali metals, alkaline-earth metals or rare earths, comprising a reaction between silica and a sulfate of said element in a reactor equipped with at least one submerged burner within a molten mass, said submerged burner being fed with a gas containing oxygen, an excess of fuel/reducing agent being introduced into the reactor relative to the oxygen effectively consumed. The process allows the reaction to be carried out satisfactorily and at relatively low temperature.
Claims22
A process for preparing a silicate of an element chosen from alkali metals, alkaline-earth metals or rare earths, comprising reacting silica and a sulfate of said element in a reactor equipped with at least one submerged burner within a molten mass, said submerged burner being supplied with an oxygen-containing gas, an excess of reducing fuel being introduced into the reactor relative to the effectively consumed oxygen,
- wherein the silicate does not contain sulfate inclusion.
A process for preparing a silicate of an element chosen from alkali metals, alkaline-earth metals or rare earths, comprising reacting silica and a sulfate of said element in a reactor equipped with at least one submerged burner within a molten mass, said submerged burner being supplied with an oxygen-containing gas, an excess of reducing fuel being introduced into the reactor relative to the effectively consumed oxygen,
- wherein the excess fuel represents from 0.1 to 2 mol of carbon equivalent and/or sulfur equivalent per mole of sulfate.
Dependencies are inferred from the claim text.