Process for recovering aluminum and other metal values from fly

Details Process for recovering aluminum and other metal values from fly Process for recovering aluminum and other metal values from fly

1978-01-30

1979-06-26

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

423 79, 423 76, 423135, 423136, 423149, 423343, 423155, 423166, 423481, C01G 2302, C01F 756, C01G 4910, C01B 3308

Patent

active

041593103

ABSTRACT:
A process for recovering aluminum from fly ash containing iron, silicon and titanium which comprises: (a) chlorinating the fly ash in an oxidizing atmosphere to selectively chlorinate and vaporize iron chloride from the remaining chlorides, (b) chlorinating the residue from step (a) in a reducing atmosphere of carbon monoxide, in the presence of added silicon chloride to suppress the chlorination of silicon, and vaporizing the chlorides of aluminum, silicon, titanium, and the residual iron, (c) separating and recovering the vaporized chlorides by selective condensation, and treating the residue of step (b) with sulfuric acid to convert calcium chloride to gypsum, and to regenerate a chloridizing and binder solution for pelletizing fly ash feed.

REFERENCES:
patent: 1147832 (1915-07-01), Kugelgen et al.
patent: 1600216 (1926-09-01), Dearborn
patent: 1605098 (1926-11-01), Dearborn
patent: 1866731 (1932-07-01), Staib
patent: 1875105 (1932-08-01), Muggleton et al.
patent: 3244509 (1966-04-01), Nowak et al.
patent: 3466169 (1969-09-01), Nowak et al.

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