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2022 | OriginalPaper | Chapter

Trace Elements in Aluminium Smelting Carbon Dust and Their Extraction

Authors : Andrey Yasinskiy, Aleksandr Shimanskii, Vladimir Losev, Olga Buyko, Yakov Kazantsev, Nataliya Simonova

Published in: Light Metals 2022

Publisher: Springer International Publishing

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Abstract

Gallium and germanium are practically important trace elements used in various high-tech areas as photovoltaics, electronic equipment, semiconductor gamma-ray detectors, infrared equipment, etc. New secondary raw materials for their extraction are a subject of a thorough search. In this study, new evidence of the presence of germanium and gallium in the wastes from the Hall–Héroult process was demonstrated and comprehensively discussed, and a method of their extraction was proposed. The concentration of gallium in the carbon dust reaches 0.02% and the concentration of germanium is below the detection limit. After the treatment of carbon dust, the concentration of trace elements is drastically increased. The carbon concentrate being a product of carbon dust treatment can be combusted to accumulate gallium in the ash while germanium distributes between the ash and the sublimates from the concentrate combustion due to the volatility of monoxide GeO. The concentration of gallium in the ash reaches 0.5 wt.% and the concentration of germanium highly depends upon the combustion temperature and the partial pressure of oxygen. The results of trace elements extraction in the acidic and basic environment are shown.

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Literature
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go back to reference George MW (2005) Germanium. Mineral Commodity Summaries 2005. Washington: U.S. Department of the Interior:70–71. George MW (2005) Germanium. Mineral Commodity Summaries 2005. Washington: U.S. Department of the Interior:70–71.
Metadata
Title
Trace Elements in Aluminium Smelting Carbon Dust and Their Extraction
Authors
Andrey Yasinskiy
Aleksandr Shimanskii
Vladimir Losev
Olga Buyko
Yakov Kazantsev
Nataliya Simonova
Copyright Year
2022
DOI
https://doi.org/10.1007/978-3-030-92529-1_56

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