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Erschienen in:
2024 | OriginalPaper | Buchkapitel
Gas Evolution During Nd and DyFe Electrowinning
verfasst von : Ole S. Kjos, Samuel Senanu, Arne Petter Ratvik, Karen Osen, Ana Maria Martinez, Wojciech Gebarowski, Anne Støre, Thomas-Park Simonsen, Henrik Gudbrandsen, Kent-Robert Molvik, Egil Skybakmoen
Erschienen in: Rare Metal Technology 2024
Verlag: Springer Nature Switzerland
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Abstract
Rare earth electrolysis from fluoride melts has a lot in common with aluminium electrolysis; however, there are significant differences that need to be understood and investigated in order to develop efficient process control. A laboratory setup was developed to efficiently trap gases and obtain a mass balance of the components in the gas phase to understand the anode reactions. Using the described setup with a NdF3-LiF electrolyte, it was possible to concentrate the off-gas (CO and CO2) to approximately 10% facilitating increased sensitivity of PFC components. The laboratory cell produced metal, and the metal yield was 83% based on mass balance of CO + CO2. The results are also discussed in context of results obtained in a small pilot cell designed and operated for metal production.