Calcining apparatus for powdery materials

Details Calcining apparatus for powdery materials Calcining apparatus for powdery materials

1985-07-22

1986-11-18

Yuen, Henry C.

Heating

Tumbler-type rotary - drum furnace

Having combustion products generated in or fed to drum

432 14, 432 58, F27B 702

Patent

active

046233113

ABSTRACT:
There is here disclosed a calcining apparatus for a powdery material comprising a first preheating series composed of a calcining kiln and preheaters at a plurality of stages for heating the powdery material with an exhaust gas from the calcining kiln, a second preheating series composed of a calcining chamber disposed on an exhaust gas pipe extending from a rotary kiln and other preheaters at a plurality of stages for heating the powdery material with an exhaust gas from a rotary kiln, a gas carrying pipe for connecting the first and second preheating series in the middle thereof, and a flow path through which the powdery material fed to first and second preheating series passes is provided with a powdery material carrying pipe for connecting both series in front of second preheaters from the bottom in both series, and is further provided with a combining duct for combining powdery materials from both the series in the rear of the second preheaters from the bottom in both series, the flow path for the powdery material being adapted so that the powdery material fed to each series may be led into the rotary kiln via the combining duct and then via the undermost traveling portions of both series.

REFERENCES:
patent: 3881861 (1975-05-01), Ritzman
patent: 3914098 (1975-10-01), Kano et al.
patent: 3986818 (1976-10-01), Deussner et al.
patent: 4022568 (1977-05-01), Meedom
patent: 4094626 (1978-06-01), Boyhont et al.
patent: 4108593 (1978-08-01), Christiansen
patent: 4218210 (1980-08-01), Herchenbach
patent: 4276020 (1981-06-01), Shibuya

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