Process for manufacture of silica granules

Details Process for manufacture of silica granules Process for manufacture of silica granules

1995-06-02

1997-07-01

Czaja, Donald E.

Glass manufacturing

Processes

Self-supporting particle making

65 214, 65 215, 65 173, 433223, C03B 1910

Patent

active

056433476

ABSTRACT:
To produce a free-flowing granulate which has a high bulk density and a defined particle size distribution, which generates little dust, is easy to handle, and is suitable as a starting material for quartz glass products, the mixing operation includes a first mixing phase, in which the materials to be mixed are subjected to a slow mixing action to form a coarse-grained mass, and a second mixing phase, in which the coarse-grained mass is converted to a fine-grained mass by a more intensive mixing action which grinds and compacts the grains. The content of silica powder in the materials to be mixed is adjusted at least during the second mixing phase to a value of at least 75 wt. %.

REFERENCES:
patent: Re25564 (1964-04-01), Alford et al.
patent: 2500801 (1950-03-01), Church
patent: 3321414 (1967-05-01), Vieli
patent: 3458332 (1969-07-01), Alford et al.
patent: 4042361 (1977-08-01), Bihuniak
patent: 4105426 (1978-08-01), Iler et al.
patent: 4200445 (1980-04-01), Bihuniak et al.
patent: 4952530 (1990-08-01), Brosnan et al.
Ullmann's Encyclopedia of Industrial Chemistry Fifth edition.

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