About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Reduction Technology
|
Presentation Title |
Trace Elements in Aluminium Smelting Carbon Dust and Their Extraction |
Author(s) |
Aleksandr Shimanskii, Andrei Iasinskii, Vladimir Losev, Olga Buyko, Yakov Kazantsev, Nataliya Simonova |
On-Site Speaker (Planned) |
Andrei Iasinskii |
Abstract Scope |
Gallium and germanium are practically important trace elements used in different high-tech areas. 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-Heroult process was demonstrated and comprehensively discussed. The method of their extraction was proposed. After the processing of carbon dust, the concentration of trace elements is drastically increased. The carbon concentrate being a product of carbon dust processing can be combusted to accumulate gallium in the ash while germanium distributes between the ash and the sublimates 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. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Recycling and Secondary Recovery, Extraction and Processing, Aluminum |