C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/371, 53/372,
C22B 3/00 (2006.01) C01G 3/00 (2006.01) C01G 9/00 (2006.01) C01G 51/00 (2006.01) C22B 3/28 (2006.01) C22B 3/30 (2006.01) C22B 3/36 (2006.01) C22B 3/38 (2006.01) C22B 15/00 (2006.01) C22B 47/00 (2006.01)
Patent
CA 1075015
Abstract of the Disclosure A process for working up manganese modules and selective recovery of their valuable constituents, in substance nickel, copper, cobalt and zinc, by a predominantly hydro-metallurgical procedure, characterized in that individually known chemical-metallurgical operations are so combined that: (a) the raw material, reduced to a particle size below 10mm, is suspended in water, preferably the wash solution produced at stage (b) of the process, the suspension is heated and brought to reaction at a temperature of 150° to 300°C with addition of sulphuric acid in a pressure reactor for 0.5 to 4 hours, the suspension having, after completion of the reaction, a content of sulphuric acid below 35 g/1, preferably 8 to 15 g/1, (b) the cooled suspension is filtered, the residue is washed and the filtrate subjected to a copper-specific solvent extraction with organic compounds, for example oximes or derivatives of .alpha.-hydroxyquinoline, and the copper is recovered in pure form from the extract by a suitable procedure, for example reduction electrolysis, (c) the refined product of the solvent extraction is fed, for separation of nickel, cobalt and zinc, through a selectively acting fixed bed cation exchanger which contains, for example, aminocarboxylate or iminodi- carboxylate groups, and is extracted with dilute hydrochloric acid, (d) gaseous chlorine is introduced into the hydrochloric acid extract with simultaneous addition of lime milk at a pH value of preferably 3.8 to 4 to precipitate cobalt (III) hydroxide, the precipitated hydroxide is filtered off, calcined and if desired reduced to cobalt while the filtrate at a pH value of 6.5 to 8 is treated with lime milk and the precipitate containing nickel and zinc is separated, calcined and reduced pyro-metallurgically, whereby the nickel is obtained as metal and the zinc as blast oxide, and finally (e) the residual solution denied of valuable materials flowing through the fixed bed exchanger procedure of stage (c) is brought to pH value of 7 to 10 and treated with lime milk and air and the resulting precipitate is dumped together with the residue of the pressure leaching of stage (a).
243535
Junghanss Helmut
Neuschutz Dieter
Roever Wilhelm
Scheffler Ulrich
Duisburger Kupferhutte
Fried. Krupp Gesellschaft Mit Beschrankter
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