Shaft preheater

Details Shaft preheater Shaft preheater

1979-03-08

1981-01-06

Camby, John J.

Heating

Processes of heating or heater operation

Including passing, treating or conveying gas into or through...

432 58, 432 98, 432106, F27B 1500

Patent

active

042433797

ABSTRACT:
A mechanism and method for preheating a coarse fraction and a more fine limestone fraction in a shaft preheater including a first central vertical inlet for receiving the coarse fraction which forms a descending core in a vertical preheating chamber, and a second vertical inlet receiving the finer fraction annularly around the core, directing a first upper gas feed radially into the fractions with the gas first penetrating the outer finer fraction and then the inner fraction, and directing a second heating gas flow at a lower level into the core to bring the core up to the temperature of the outer layer, with the gases being received from a rotary kiln, and mixing the fractions and directing them to the rotary kiln from the lower end of the preheating chamber.

REFERENCES:
patent: 3027147 (1962-03-01), Brakel et al.
patent: 3503790 (1970-03-01), Gringras
patent: 4025296 (1977-05-01), Buchner

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