Process for producing glass microspheres

Details Process for producing glass microspheres Process for producing glass microspheres

1985-06-20

1987-04-28

Lindsay, Robert

Glass manufacturing

Processes

Self-supporting particle making

65 22, 65 32, 65142, 501 33, C03B 1910

Patent

active

046611371

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.

REFERENCES:
patent: 2911669 (1959-10-01), Beckwith
patent: 3365315 (1968-01-01), Beck et al.
patent: 3838998 (1974-10-01), Matthews et al.
patent: 4017290 (1977-04-01), Budrick et al.
patent: 4059423 (1977-11-01), DeVes et al.
patent: 4391646 (1983-07-01), Howell
patent: 4475936 (1984-10-01), Aston et al.
Chopinet et al., Factors Determining the Residual Sulfate Content of Glass; Glasstechniche Berichte, vol. 56, pp. 596-601 (1983).

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