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Rare Metal Extraction & Processing: Poster Session
Sponsored by: TMS Extraction and Processing Division, TMS: Hydrometallurgy and Electrometallurgy Committee
Program Organizers: Gisele Azimi, University of Toronto; Takanari Ouchi, University of Tokyo; Kerstin Forsberg, KTH Royal Institute of Technology; Hojong Kim, Pennsylvania State University; Shafiq Alam, University of Saskatchewan; Alafara Baba, University of Ilorin; Neale Neelameggham, IND LLC

Monday 5:30 PM
March 15, 2021
Room: RM 44
Location: TMS2021 Virtual

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Extraction of Zn, Ga, Ge and In from Zinc Plant Residues: Vivek Kashyap¹; ¹Colorado School of Mines
    Gallium, germanium and indium are not commercially extracted from their respective minerals. They are extracted as byproducts in zinc and aluminium processing. The most common source of extraction of Ga, Ge and In is the Bayer liquor and zinc plant residues (ZPL). ZPL may have a high zinc ferrite content which is refractory to leaching. The difficulty in leaching zinc ferrite leads to inefficient extraction of trace elements such as Ga, Ge and In. This study employs a combination of Pyrometallurgy and Hydrometallurgy to improve the extraction of these elements and zinc from the residue. The zinc ferrite phase was successfully decomposed by reduction roasting with H2 gas to form zinc oxide and magnetite. The complete decomposition of zinc ferrite was achieved at 823°K. The product obtained from the reduction roasting was leached under various conditions to evaluate the favorable extraction conditions for target elements (Zn, Ga, Ge and In).

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