Method of reprocessing jarosite-containing residues

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

C - Chemistry, Metallurgy

22

B

53/113, 53/328,

C22B 3/08 (2006.01) B03B 9/04 (2006.01) B09B 3/00 (2006.01) C01B 17/02 (2006.01) C01B 17/06 (2006.01) C22B 3/00 (2006.01) C22B 7/00 (2006.01) C22B 9/02 (2006.01) C22B 19/20 (2006.01) C22B 19/30 (2006.01) C25C 1/00 (2006.01) C25C 1/16 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2027973

ABSTRACT For a 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 to 170 °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 pro- duotion 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 utiliza- tion.

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