Calcination apparatus

Details Calcination apparatus Calcination apparatus

1989-02-28

1990-04-10

Yuen, Henry C.

Heating

Work chamber having heating means

Having means by which work is progressed or moved mechanically

432197, 432 14, 422114, F26B 918, B01J 600

Patent

active

049156233

ABSTRACT:
The invention concerns an improved method of calcining gypsum in which non-reactive hot gas is passed into contact with the gypsum from a source through a plurality of tubes extending downwardly into the gypsum. The invention also contemplates an improved apparatus which comprises a calcining kettle and a plurality of tubes connected to a common source of non-reactive hot gas and extending downwardly into the kettle and having openings in their lower regions to release the hot gas into the contents of the kettle. The invention provides a method and apparatus which produces gypsum plaster of improved quality and with less insoluble anhydrite.

REFERENCES:
patent: 1234240 (1917-07-01), Wiederwax
patent: 2464304 (1949-03-01), Gottlieb
patent: 4529374 (1985-07-01), Malik et al.
patent: 4576573 (1986-03-01), Ruehenbeck
patent: 4615867 (1986-10-01), Heckman

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