Extraction Of Critical Electronic Materials From Steelmaking Wastes
The stable domestic supply of gallium, indium, and germanium has been identified as a critical need for the USA. Electric arc furnace dusts processed to recover zinc produce a process residue that could be a potential source of these critical materials. An industrial zinc leach residue was characterized to determine the predominant mineral phases and leached with common mineral acids. Atmospheric agitated leaching using sulfuric acid and hydrochloric acid were examined to determine the extractions of gallium, indium, and germanium as a function of concentration, temperature, and time. Extractions of gallium were found to be similar to iron in all experiments. The maximum percentage of Ga, Ge, and In leached into solution were 82%, ~100%, and 89%, respectively.
W. Hartzell and M. S. Moats, "Extraction Of Critical Electronic Materials From Steelmaking Wastes," Mining, Metallurgy and Exploration, Springer, Jan 2023.
The definitive version is available at https://doi.org/10.1007/s42461-023-00819-w
Materials Science and Engineering
Keywords and Phrases
Critical materials; Gallium; Germanium; Indium; Recycling; Zinc residue
International Standard Serial Number (ISSN)
Article - Journal
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01 Jan 2023