Apparatus for the mutli-step calcination of cement-clinker

Details Apparatus for the mutli-step calcination of cement-clinker Apparatus for the mutli-step calcination of cement-clinker

1979-09-04

1981-09-15

Camby, John J.

Heating

Tumbler-type rotary - drum furnace

Having combustion products generated in or fed to drum

432163, F27B 702, F27B 304

Patent

active

042894832

ABSTRACT:
Apparatus for the production of cement from raw material to the clinker stage is disclosed. The raw material is first heated in a heat exchanger with the heat energy being supplied by the waste heat from subsequent stages of this process. The heated raw material is then passed into a heat exchanger to be partially calcined. Calcination is completed in another heat exchanger, with the waste heat used in the final calcination being supplemented with combustion of a fuel. The calcined material is then passed to a kiln for conversion to clinker, from which the material is then cooled, the warmed cooling air to be used partially for combustion in the kiln and partially during calcination.

REFERENCES:
patent: 3938949 (1976-02-01), Christiansen
patent: 4094626 (1978-06-01), Boyhont et al.
patent: 4108593 (1978-08-01), Christiansen
patent: 4130390 (1978-12-01), Kobayashi et al.

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