Preparation of Cadmium Ingot and Nickel Powder from Spent Cd-Ni Batteries

Abstract

Cadmium ingot and nickel powder were prepared by high-temperature distillation, solvent extraction and liquid phase reducing method with spent Cd-Ni batteries as raw material. the impacts of the temperature in the distilling stage, the concentration of H2SO4 in the leaching stage, the pH value in the extracting stage and the dosage of hydrazine in the reducing stage were discussed respectively. the asprepared samples were characterized by the means of X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic absorption spectrometry (AAS) and inductively coupled plasma-atomic emission spectrometry (ICP-AES). the results showed that the recovering efficiencies of Cd and Ni reach 99.5% and 99.3%, and the purities of Cd ingot and nickel powder were higher than 99.90% and 99.80%, respectively.

Department(s)

Materials Science and Engineering

Keywords and Phrases

High-temperature distillation; Nickel powder; Solvent extraction; Spent Cd-Ni batteries

International Standard Book Number (ISBN)

978-087339735-3

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 The Minerals, Metals & Materials Society, All rights reserved.

Publication Date

24 Jun 2009

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