Study of alkaline hydrometallurgical process for stibnite flotation tailings reprocessing: Semi-pilot antimony leaching
Dembele S. Akcil A. Panda S.
March 2025Elsevier Ltd
Minerals Engineering
2025#222
Nowadays, tailings management and scarcity of raw materials are both topics that are much discussed in the mining sector. Recycling is therefore a sustainable method of extracting metals from secondary resources for tailings management and the supply of critical metals such as antimony. Alkaline leaching was carried out using mixture of sodium sulfide (Na2S) and sodium hydroxide (NaOH). Optimisation tests at laboratory scale allow the optimum parameters to be set at 25 % pulp density, 0.97 M Na2S, 2.5 M NaOH, 70 °C, 300 rpm for 60 min. The antimony dissolution rates were 99.13 % and 97.00 % at bench and semi-pilot scale, respectively. On the other hand, hydrogen peroxide (H2O2) was used to precipitate antimony from the leach solution. About 99 % of Sb precipitation efficiency was achieved under 5/1 Pregnant Leach Solution (PLS)/Hydrogen peroxide (H2O2) ratio, 30 °C, 300 rpm for 90 min.
Alkaline leaching , Antimony , Design of experiment , Precipitation , Stibnite tailings
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Department of Mining Engineering, Mineral Processing Division (Mineral-Metal Recovery and Recycling Research Group), Suleyman Demirel University, Isparta, TR32260, Turkey
Department of Classified Facilities and Mining Environment (DICEM), National Directorate of Geology and Mines (DNGM), Bamako, Mali
School of Mining and Geosciences (SMG), Mineral-Metal Resources and Recovery Research Group, Nazarbayev University, 6 Block, 53 Kabanbay Batyr Avenue, Astana, 010000, Kazakhstan
Department of Industrial Biotechnology, Gujarat Biotechnology University (GBU), Gujarat, Gandhinagar, 382355, India
Department of Mining Engineering
Department of Classified Facilities and Mining Environment (DICEM)
School of Mining and Geosciences (SMG)
Department of Industrial Biotechnology
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