Methods and apparatus for the heat treatment of fine-grained mat

Details Methods and apparatus for the heat treatment of fine-grained mat Methods and apparatus for the heat treatment of fine-grained mat

1976-01-12

1977-11-29

Camby, John J.

Heating

Processes of heating or heater operation

Including passing, treating or conveying gas into or through...

432 58, 432106, F27B 1500

Patent

active

040603750

ABSTRACT:
Fine-grained material such as raw ground cement adapted to be fired in a rotary tube furnace is introduced to a vertical preheater and falls through a heating zone located at a level below the level at which the material enters the preheater. A stream of air enters the preheater at a level below the heating zone and passes upwardly at sufficient velocity to entrain the material that has passed through the heating zone, thereby causing such material to pass again through the heating zone. From the preheater the material is delivered to the furnace for final firing.

REFERENCES:
patent: 2621034 (1952-12-01), Stecker
patent: 3834860 (1974-09-01), Fukuda et al.
patent: 3904353 (1975-09-01), Bosshard et al.
patent: 3940236 (1976-02-01), Weber et al.

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