Method of reprocessing jarosite-containing residues

Details Method of reprocessing jarosite-containing residues Method of reprocessing jarosite-containing residues

1990-10-23

1995-09-26

Breneman, R. Bruce

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

4231506, 4231501, 423110, 4235671, 204119, 204112, 204114, C01B 1702

Patent

active

054532531

ABSTRACT:
For reprocessing of jarosite-containing residues to provide usable products, the jarosite-containing residues and concentrates which contain zinc sulfide are stirred in dilute sulfuric acid, which contains 40 to 100 g/l free sulfuric acid, in an autoclave under an oxygen partial pressure of at least 1,000 kPa and at a temperature from 130.degree. to 170.degree. C., the iron contents and the zinc contents of the residue and of the concentrate which contains zinc sulfide are substantially dissolved, flashing is effected and is succeeded by a separation of solution and solids, the solution is fed to the leaching circuit of a plant for the electrolytic production of zinc with precipitation of iron as hematite, the elemental sulfur is separated from the solids and the hematite residue is supplied to a further utilization.

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Dr. Michael Koch, Productivity and Technology in the Metallurgical Industries, 1989, pp. 587-589.
Adolf von Ropenack, 1989, Ruckstandsfreie hydrometallurgische Zinkgewinnung durch das Hamatitverfahren, in Erzmetall 42, 1989, pp. 125-129 Abstract Only.

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