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The cementation of copper and cadmium by zinc powder

Associação Brasileira de Metalurgia, Materiais e Mineração

2019ptcementationkineticscoppercadmium

Abstract

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The cementation of copper and cadmium by zinc powder was investigated in order to assess the influence of different parameters in the process. The results showed that the process follows a first order reaction with two stages in both systems. In the system Cu/Zn, the second stage is faster than the first while in the system Cd/Zn the second stage is slower than the first. In the system Cu/Zn, the variation on the surface area of copper cement followed a power law and a straight line was obtained by plotting –ln([Cu 2+]/[Cu2+]0) against t3/2, the activation energy was calculated as 16.3kJ. In the system Zn/Cd the surface area available for reaction decreased as a result of the cement agglomeration. On the experiments carried out with ions Cu2+ and Cd2+ in solution, purer copper cement was obtained when the experiments were carried out in the presence of less than stoichiometric amount of zinc powder and longer reaction times.

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Cite This Work

@article{20797ab0-63ba-4dbc-a2fc-634ac059b9b7,
  title={The cementation of copper and cadmium by zinc powder},
  author={Associação Brasileira de Metalurgia and Materiais e Mineração},
  year={2019},
  language={pt}
}
TY  - JOUR
TI  - The cementation of copper and cadmium by zinc powder
AU  - Associação Brasileira de Metalurgia
AU  - Materiais e Mineração
PY  - 2019
LA  - pt
ER  -

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