Method and apparatus for heat treatment of lime mud

Details Method and apparatus for heat treatment of lime mud Method and apparatus for heat treatment of lime mud

1990-01-22

1992-05-05

Langel, Wayne A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

422232, 423637, 432106, C01F 1106

Patent

active

051105675

ABSTRACT:
In the heat treatment of lime mud, the lime mud to be introduced to a lime reburning kiln is dried in a pneumatic drier by flue gases from the lime reburning kiln in order to regenerate the lime contained in the mud. Prior to drying, the lime mud is thickened in a drying filter to a dry solids content of over 75%, preferably to approximately 80%. In this way, the lime reburning kiln can be made approximately 30% shorter than conventional kilns, and the apparatus is simpler than the conventional apparatus provided with a pneumatic drier.

REFERENCES:
patent: 2503788 (1950-04-01), White
patent: 2650084 (1953-08-01), White
patent: 2774661 (1956-12-01), White
patent: 3664650 (1972-05-01), Weber et al.
patent: 3796791 (1974-03-01), Nielsen et al.
patent: 4098871 (1978-07-01), Schoppe
patent: 4321239 (1982-03-01), Bildjukevich et al.
John H. Perry, Chemical Engineers' Handbook, Fourth Edition (1963), McGraw-Hill Book Co., pp. 20-54 through 20-57.

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