Method and apparatus for producing cement clinker

Details Method and apparatus for producing cement clinker Method and apparatus for producing cement clinker

1998-04-10

2000-01-11

Jeffrey, John A.

Heating

Tumbler-type rotary - drum furnace

Having combustion products generated in or fed to drum

432105, F27B 702

Patent

active

060129182

ABSTRACT:
Cement clinker is produced from powdered and fine-grained raw material by the use of a vertical stage cyclone preheater, a precalcinator, a kiln, and a cooler. The raw material is preheated by exhaust gases from the kiln and the cooler. Dust is filtered out of the exhaust gases, preheated, precalcined, and then burnt to cement clinker in a kiln. Downstream of the first preheater stage a relatively smaller part-quantity of the material is branched off and fed as a mixture jointly with the dust from the filter to the upper end of the precalcinator. This mixture passes through the precalcinator from top to bottom co-current with combustion air and with fuel for precalcination and then is delivered to the kiln inlet.

REFERENCES:
patent: 3920380 (1975-11-01), Heian
patent: 4295823 (1981-10-01), Ogawa et al.
patent: 4392822 (1983-07-01), Brachthauser et al.
patent: 4616575 (1986-10-01), Schulte
patent: 5325606 (1994-07-01), Liborius

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