C - Chemistry – Metallurgy – 22 – B
Patent
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.
Bohmer Winfried
Grimm Heiner
von Ropenack Adolf
Robic
Ruhr-Zink Gmbh
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