Fluid bed calcining process

Details Fluid bed calcining process Fluid bed calcining process

1979-10-01

1981-04-21

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

422142, 423DIG16, 432 15, 432 58, 432 72, C01F 1100, F27B 1500

Patent

active

042632625

ABSTRACT:
In order to increase or maintain the capacity of fluid bed calciners in the calcination of phosphate rock containing large amounts of organic matter ("hot rocks"), the calciner is modified to permit a pyrolysis reaction to occur in the freeboard zone of the calciner. The hydrocarbons and carbon monoxide gas produced by the pyrolysis reaction are removed from the calciner and burned in an afterburner unit. Dust and fines entrained in the exhaust from the calciner are sent to a dust oxidation chamber outside the calciner for oxidation by addition of air.

REFERENCES:
patent: 3266788 (1966-08-01), Jukkola
patent: 3364008 (1968-01-01), Hollingsworth et al.
patent: 3758266 (1973-09-01), Retali et al.
patent: 3872211 (1975-03-01), Wall
patent: 3998929 (1976-12-01), Leyshon
patent: 4017585 (1977-04-01), Angeuine et al.
patent: 4083929 (1978-04-01), Priestley
patent: 4085516 (1978-04-01), Jukkola et al.

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