Process for producing glass microspheres
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United States of America Patent
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Apr 28, 1987
Grant Date -
N/A
app pub date -
Jun 20, 1985
filing date -
Jun 21, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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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