Heating – Tumbler-type rotary - drum furnace – Having combustion products generated in or fed to drum
Patent
1998-09-02
1999-09-21
Walberg, Teresa
Heating
Tumbler-type rotary - drum furnace
Having combustion products generated in or fed to drum
432 14, 432 58, F27B 1500
Patent
active
059544996
ABSTRACT:
The present invention relates to a plant for manufacturing cement clinker. The plant consists of a preheater, a calciner in which the raw material is calcined at a temperature of more than 800.degree. C. and where fuel and oxygen-containing gas are fed to the lowermost zone of the calciner, and a kiln. The object of the invention is to provide a plant for manufacturing cement in which it is possible to bum lumpy fuel in a calciner, while simultaneously maintaining the possibility of increasing the time of retention and possibly the temperature of the material being fed to the lowermost zone in the calciner. This object is achieved according to the invention in that the calciner is provided with a fixed bottom (27) allowing combustible material fed to the calciner to be deposited on the bottom and in that oxygen-containing gas is fed horizontally to the calciner through openings in the lowermost zone of the calciner. That the oxygen-containing gas is fed horizontally entails that the gas is introduced through the vertical sides/walls of the calciner, and not through the bottom.
REFERENCES:
patent: 4017253 (1977-04-01), Wielang et al.
patent: 4058069 (1977-11-01), Baing et al.
patent: 4353750 (1982-10-01), Quittkat
patent: 4527973 (1985-07-01), Kondoh et al.
patent: 5800610 (1998-09-01), Jons
F. L. Smidth & Co. A/S
Walberg Teresa
Wilson Gregory A.
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