Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkaline earth metal
Patent
1979-08-09
1981-09-01
Yuen, Henry C.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Alkaline earth metal
423175, 423637, 106100, 432 99, C01F 100
Patent
active
042871603
ABSTRACT:
Process for the burning of lime, cement or other lumpy bulk materials in a shaft kiln using coal. Coal dust or particulated dry coal is continuously fed into a gasification chamber positioned in the center of the shaft kiln and is therein partially or fully gasified by the addition of air in substoichiometric proportions. The partially or fully gasified fuel is mixed with air at an elevated temperature. Such mixture is then burned in the burning zone of the shaft kiln. The flow of the heating medium, i.e., the burnt fuel, and the flow of the kiln charge are co-current within the kiln. The shaft kiln has a centrally postioned gasification chamber which is mounted on radial supports which are positioned in the shaft kiln in such a way as to produce a space below the supports. The space is substantially free from kiln charge. Uniform distribution of the gases is guaranteed across the cross section of the shaft kiln by the space.
REFERENCES:
patent: 1804362 (1931-05-01), Martin
patent: 1912621 (1933-06-01), Clark
patent: 2742276 (1956-04-01), Azbe
patent: 3917795 (1975-11-01), Pelczanski et al.
patent: 3941557 (1976-03-01), Buchner
Johann Schaefer Kalkwerke
Yuen Henry C.
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