Method for making shaped foam glass bodies

Details Method for making shaped foam glass bodies Method for making shaped foam glass bodies

1982-04-12

1984-02-07

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

With pore forming in situ

106 75, 501 39, 501 85, C03B 1908

Patent

active

044301073

ABSTRACT:
Method for making shaped foam glass bodies from ground glass by hydrolysis in a hydrolysis mixture with solid alkali silicate and water, in which at least one foaming agent is added to the hydrolysis mixture, or to a resulting slip to form a foam producing mass, and in which the foam producing mass is foamed at an increased temperature. A mixture of two types of glass, namely (a) glass containing more than 16% by weight alkali oxide, and (b) glass containing less than 16% by weight alkali oxide, 95% of each having a grain size of less than 0.1 mm, at a weight ratio of a:b=1.1.5 to 1:20 is mixed with water at temperatures from 50.degree. to 100.degree. C. until the mixture thickens, the ratio of water to total solids being 1:1.4 to 2.5. The resulting mass into shaped foam glass bodies.

REFERENCES:
patent: 2123536 (1938-07-01), Long
patent: 2156457 (1939-05-01), Long
patent: 3321414 (1967-05-01), Lieli
patent: 3744984 (1973-07-01), Sato
patent: 3840380 (1974-10-01), Kraemer et al.
patent: 3874861 (1975-04-01), Kurz
patent: 3877954 (1975-04-01), Wustefeld
"Soviet Radiation-Resistant Foam Glass", Nuclear Engineering, Aug. 1963, p. 285.

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