Process for the recovery of zinc, copper and cadmium in the leac

Details Process for the recovery of zinc, copper and cadmium in the leac Process for the recovery of zinc, copper and cadmium in the leac

1980-08-26

1983-05-17

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423146, 423 41, 423106, 423109, 423DIG15, 75101R, 75120, C01G 310, C01G 906, C01G 1100, C01G 4900

Patent

active

043839797

ABSTRACT:
Zinc, copper and cadmium are recovered from their ferrites by subjecting the ferrites to a sulfuric acid bearing solution in the presence of potassium, sodium or ammonium ions under atmospheric conditions at 80.degree.-105.degree. C. to precipitate the iron present in the ferrites as jarosite, separating at least a portion of the jarosite-bearing solid material from the solution before recycling the solution to a neutral leach, from which a copper and cadmium bearing solution is recovered and to which acid and calcine are also fed, feeding the solid obtained from the neutral leach to the said ferrite treatment stage classifying the solid obtained from the neutral leach into a finer and coarser fraction, feeding the finer fraction to the ferrite treatment stage, comminuting the coarser fraction by grinding, leaching or milling and recycling the comminuted fraction to the process.

REFERENCES:
patent: 3305353 (1967-02-01), Duncan et al.
patent: 3791595 (1974-02-01), Aubrey
patent: 3959437 (1976-05-01), Rastas et al.
patent: 3985857 (1976-10-01), Menendez et al.
patent: 4119699 (1978-10-01), Kellerwessel

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