Apparatus for heat treatment of fine-grained material

Details Apparatus for heat treatment of fine-grained material Apparatus for heat treatment of fine-grained material

1983-05-23

1984-12-25

Yuen, Henry C.

Heating

Tumbler-type rotary - drum furnace

Having combustion products generated in or fed to drum

432 14, F27B 1500, F27B 702

Patent

active

044901097

ABSTRACT:
Apparatus for heat treatment of fine-grained material has a multi-stage cyclone preheater, a rotary kiln, and a gas pipe extending between the kiln and the preheater and forming a calcination zone for precalcining materials entrained in the gas stream. The gas pipe has an upwardly extending pipe section that communicates with an arcuate deflector section and a downward pipe section which extends downwards to and communicates with the lowest cyclone stage. The downwardly extending pipe section of the gas pipe has an extension constructed as a coarse separator so that relatively coarse material particles contained in the mixed gas-material stream are kept away from the lowest cyclone stage of the preheater.

REFERENCES:
patent: 3836323 (1974-09-01), Engel
patent: 4201546 (1980-05-01), Herchenbach et al.
patent: 4260370 (1981-04-01), Goldmann et al.
patent: 4270900 (1981-06-01), Shy et al.

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