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Towards Using MMO Anodes in Zinc Electrorefining: Mn Removal by Simulated Plant Off-Gas

Masoomeh Askarian, Fariba Mousavi

2023enzincelectrorefiningmanganeseoff-gasMMO

Abstract

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Implementing mixed metal oxide (MMO) anodes in zinc electrowinning is highly desired due to the considerable reduction in electrical energy consumption. However, the presence of manganese in the electrolyte is a major obstacle for implementing MMO anodes in the zinc cell houses. In this work, we explore the possibility of using plant off-gas, containing SO2, to remove manganese. A SO2/air gas mixture with different SO2 and O2 concentrations was therefore used for the oxidative precipitation of manganese. It was shown that the manganese oxidation reaction is highly pH-dependent. Calcium hydroxide was used to control the pH during the process. Different operating parameters, i.e., pH, SO2/air ratio, reaction time, and effect of cobalt as a reaction catalyst, were investigated. Optimal conditions for manganese removal were reported. Under the optimal conditions, the manganese concentration decreased from 1 g L−1 to.

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Cite This Work

@article{f4c998f6-1e04-498f-b845-d7aff0a4ad4a,
  title={Towards Using MMO Anodes in Zinc Electrorefining: Mn Removal by Simulated Plant Off-Gas},
  author={Masoomeh Askarian and Fariba Mousavi},
  year={2023},
  language={en}
}
TY  - JOUR
TI  - Towards Using MMO Anodes in Zinc Electrorefining: Mn Removal by Simulated Plant Off-Gas
AU  - Masoomeh Askarian
AU  - Fariba Mousavi
PY  - 2023
LA  - en
ER  -

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