Apparatus for the thermal treatment of fine-grained material wit

Details Apparatus for the thermal treatment of fine-grained material wit Apparatus for the thermal treatment of fine-grained material wit

1979-04-03

1981-11-10

Camby, John J.

Heating

Tumbler-type rotary - drum furnace

Having combustion products generated in or fed to drum

423 58, F27B 702, F27B 1500

Patent

active

042995647

ABSTRACT:
Apparatus for the thermal treatment of finely divided material for the calcination of cement wherein the material is preheated in a multi-stage heat exchanger and later passed to a calcining furnace. The material is partly deacidified in a pre-calcination zone before entering the sintering furnace where further calcining and sintering of the material is completed. A portion of the feed material is treated with rapidly oxidizing fuel components in a pre-calcination zone in a first stage and with more slowly oxidizing fuel components in a second stage, the more slowly oxidizing fuel components being a mixture of relatively fine granulated fuel particles of substantially uniform size and larger particles of briquetted or coarsely broken fuel.

REFERENCES:
patent: 3910754 (1975-10-01), Weber et al.
patent: 4066470 (1978-01-01), Brachthauser et al.

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