Method and apparatus for continuously calcining gypsum

Details Method and apparatus for continuously calcining gypsum Method and apparatus for continuously calcining gypsum

1999-03-11

2000-07-04

Griffin, Steven P.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423170, 423172, 422233, 422276, 106772, C04B 1102, C04B 210, B01J 808, B01D 1102

Patent

active

06083465&

ABSTRACT:
An apparatus for continuously calcining gypsum includes a flash calcining impact mill, a feed bin adjacent the impact mill for holding gypsum, and a gypsum feed control mechanism for supplying gypsum from the feed bin to the impact mill at a substantially constant rate. A method for continuously producing calcined gypsum includes the steps of providing a flash calcining impact mill and providing a feed bin adjacent the impact mill, the feed bin containing gypsum to be calcined. A gypsum feed control mechanism is provided for supplying gypsum from the feed bin to the impact mill. Gypsum is supplied from the feed bin to the impact mill at a substantially constant rate, and the impact mill is operated to dry, grind, and calcine the gypsum.

REFERENCES:
patent: 4080422 (1978-03-01), McClearly
patent: 4502901 (1985-03-01), Burkard
Kirk-Othmer, Encyclopedia of Chemical Technology, Fourth Edition, vol. 4, pp. 812-826, 1992.

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