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Hydrometallurgical recovery process for nickel-cadmium spent batteries

✍ Scribed by Mauro Bartolozzi; Gaetano Braccini; Stefania Bonvini; Pier Filippo Marconi

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
299 KB
Volume
55
Category
Article
ISSN
0378-7753

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✦ Synopsis

The most recent literature on the treatment of nickel-cadmium spent batteries often describes mixed pyro-and hydrometallurgical processes with different options (precipitation, electrolysis, solvent extraction) for the recovery of the metal. The present work shows a completely hydrometallurgical process in which electrode powder is mechanically separated from the external case and the metal supports, and afterwards, the powder is leached with acid and then electrolyzed. It was thus possible to recover cadmium with 1.2% of nickel; nickel was finally precipitated as carbonate, containing less than 0.5% of cadmium.

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