Study of alkaline hydrometallurgical process for stibnite flotation tailings reprocessing: Semi-pilot antimony leaching
Minerals Engineering, cilt.222, 2025 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 222
- Basım Tarihi: 2025
- Doi Numarası: 10.1016/j.mineng.2024.109168
- Dergi Adı: Minerals Engineering
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Veterinary Science Database, Civil Engineering Abstracts
- Anahtar Kelimeler: Alkaline leaching, Antimony, Design of experiment, Precipitation, Stibnite tailings
- Süleyman Demirel Üniversitesi Adresli: Evet
Özet
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.