Chemistry: physical processes – Physical processes – Crystallization
Patent
1976-02-20
1977-05-31
Scovronek, Joseph
Chemistry: physical processes
Physical processes
Crystallization
23260, 23277R, 23284, 432 15, 432 58, B01J 600, B01J 826, B01J 836, F27B 1500
Patent
active
040266729
ABSTRACT:
A plant, comprising apparatus for sequential fluidized bed roasting, reducing and cooling of powdered alunite, mounted on a support and communicating with devices for supplying gas into each apparatus and with cyclones for trapping powdered alunite from flue gases and returning it into said apparatus. According to the invention, built-in the plant in front of the apparatus for roasting alunite, is a shaft heat exchanger having at least one throat subdividing its interior in height into a top and bottom chamber with the ratio of the passage cross-sectional areas of the wide and narrow parts falling within a range of from 2 to 12. The top chamber of the shaft heat exchanger communicates with a cyclone heat exchanger via a supply pipe to which is connected an initial alunite feeder and a cyclone, the bottom chamber of the shaft heat exchanger being in communication with a means for producing flue gases and a pipe discharging gas from the apparatus for reducing alunite though a cyclone.
The plant may comprise the second heat exchanger built-in intermediate of the apparatus for roasting and that for reducing alunite.
As compared with the known similar plants, the plant, according to the invention, provides for the production of alunite featuring a higher quality and at much lower expenditures.
REFERENCES:
patent: 2506542 (1950-05-01), Caldwell, Jr. et al.
patent: 3236607 (1966-02-01), Porter, Jr. et al.
patent: 3282577 (1966-11-01), Cottle
patent: 3910755 (1975-10-01), Syska
Abramova Ljudmila Nikolaevna
Averin Vitaly Mikhailovich
Denisov Vladislav Mikhailovich
Kaim German Abramovich
Kaluzhsky Nikolai Andreevich
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