{"title":"Study of alkaline hydrometallurgical process for stibnite flotation tailings reprocessing: Semi-pilot antimony leaching","authors":"Seydou Dembele , Ata Akcil , Sandeep Panda","doi":"10.1016/j.mineng.2024.109168","DOIUrl":null,"url":null,"abstract":"<div><div>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 (Na<sub>2</sub>S) and sodium hydroxide (NaOH). Optimisation tests at laboratory scale allow the optimum parameters to be set at 25 % pulp density, 0.97 M Na<sub>2</sub>S, 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 (H<sub>2</sub>O<sub>2</sub>) 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 (H<sub>2</sub>O<sub>2</sub>) ratio, 30 °C, 300 rpm for 90 min.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"222 ","pages":"Article 109168"},"PeriodicalIF":5.0000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Minerals Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0892687524005971","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/4 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
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Abstract
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.
期刊介绍：
The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.
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