Saint-gobain Vitrage

Michel Coquillon

Gilles Courtemanche

Patrick Garnier

Daniel Abriou

Method for producing glass sheets using flotation

The invention relates to a process and apparatus for producing hollow glass microspheres. According to embodiments of the invention, particles of a soda-lime-silica glass containing slight amounts of sulfur compounds are suspended in a gaseous current and expanded in a burner, at a treatment temperature at least 100.degree. C. above the working temperature at which the specific type of glass constituting the treated particles is made from its raw materials, such as sand, lime, sodium carbonate, sodium sulfate, and others, depending on the particular type of glass. The process makes it possible to increase the yield of the transformation of the particles.

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Chauconin-Neufmontiers, France

Michel Coquillon