F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
39/20, 39/27
F27B 7/00 (2006.01) C04B 7/43 (2006.01) F27B 7/20 (2006.01) F27B 7/38 (2006.01)
Patent
CA 1055248
IMPROVEMENTS RELATING TO THE BURNING OF PULVEROUS OR GRANULAR RAW MATERIALS ABSTRACT OF THE DISCLOSURE A method is disclosed for burning pulverous or granular raw material such as cement raw meal in a rotary kiln plant by directing a first flow of raw material to a cyclone preheater, preheating the first flow of raw material in the cyclone preheater, and directing the preheated raw material from the cyclone preheater to a rotary kiln for burning the material in the kiln. The burnt kiln product is directed to a cooler which may be of several types and which communicates with the material outlet of the kiln while a second flow of fresh raw material is directed to the cooler to at least partially cool the burnt kiln product by trans- ferring heat therefrom to the second flow of fresh raw mate- rial in the cooler. The method further involves combining- the preheated, at least partially calcined second flow of material with the first flow of preheated, at least partially calcined material prior to directing the combined flows to the rotary kiln and thereafter directing the combined flows to the kiln for burning and for subsequent cooling in the cooler. The invention also pertains to a unique kiln plant for practicing the inventive method.
252181
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