Process for preparing calcined gypsum

Details Process for preparing calcined gypsum Process for preparing calcined gypsum

1977-03-14

1978-09-26

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

156 39, 264333, 264345, 264349, B32B 1300, B28B 300

Patent

active

041170709

ABSTRACT:
An improved process for producing calcined gypsum which comprises continuously treating a mass of calcined gypsum by adding, with thorough blending agitation, small metered portions of water to result in the incorporation of about 1-8% free water in the mass by weight of the gypsum, allowing the blended mass to heal the calcium sulfate hemihydrate surface fissures and thereafter continuously supplying the treated gypsum mass into gypsum board production.

REFERENCES:
patent: 2088813 (1937-08-01), Roos
patent: 3972972 (1976-08-01), Yano

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