Apparatus for preheating granular material

Details Apparatus for preheating granular material Apparatus for preheating granular material

1991-06-24

1993-03-16

Chambers, A. Michael

Heating

Tumbler-type rotary - drum furnace

Having combustion products generated in or fed to drum

432 13, 432 58, F27B 1500

Patent

active

051939975

ABSTRACT:
An apparatus for preheating a granular material having a suspension preheater including a plurality of stages of cyclones arranged above a calcination furnace such that the granular material is preheated by waste gas from the calcination furnace as the granular material passes through the suspension preheater. The apparatus has a precalciner of fluidized-bed type or spouted-bed type connected, in place of a duct used in conventional apparatus, between a collecting cyclone directly connected to be calcination furnace and a first cyclone constituting the most downstream stage.

REFERENCES:
patent: 3738794 (1973-06-01), Thelen
patent: 4039277 (1977-08-01), Kobayashi et al.
patent: 4504319 (1985-03-01), Wolter et al.
patent: 4527973 (1985-07-01), Konocloh et al.
patent: 4664625 (1987-05-01), Desmidt
patent: 5049198 (1991-09-01), Ribas
Chem. Abstr. vol. 108, No. 4, "Firing Apparatus for Cement Clinker"; Jan. 25, 1988, Abstract No. 26332H.

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