Antimony release and isotope fractionation during leaching of stibnite …
Antimony release and isotope fractionation during leaching of stibnite (Sb 2 S 3 ): An experimental study. To read the full-text of this research, you can request a copy directly from...
Kinetics of leaching of stibnite by mixed Na2S and NaOH …
In the present work chemical basic leaching of pure Stibnite (Sb 2 S 3) by Na 2 S and NaOH under different experimental conditions at 40°C, has been studied in order to optimise the reagent concentrations for the antimony dissolution process.
Reductive leaching of stibnite (Sb2S3) flotation …
In this work, the kinetics of reductively leaching stibnite using metallic iron in a hydrochloric acid medium at varying pH, iron-to-concentrate ratio and temperature, have been investigated.
Antimony release and isotope fractionation during …
It appears that slow Sb leaching with weak acids results in the preferential mobilisation of heavier Sb isotope, potentially due to partial re-equilibration of leachate and residue. A stronger acid, such as HNO3, quantitatively dissolves stibnite and does not generate isotope fractionation.
Antimony release and isotope fractionation during leaching of stibnite …
We have performed leaching expetiments with three reagents: 0.5 M HNO 3, 0.05 M HCl, and 0.1 M oxalic acid on stibnite powder (0.1 g Sb) to test antimony release and isotopic fractionation. Duration of each experiment was from 10 minutes to up to 7 days at room temperature and pressure.
(PDF) Effect of selected parameters on stibnite concentrates leaching
High antimony extraction (94.3%) with low iron dissolution (2.3%) is achieved under the following leaching conditions: 4.5 mol/L hydrochloric acid concentration, 2.0 L/min gas flow rate and 8:1 of the L/S ratio, leaching for 4.0 h at 65 °C.
Reductive leaching of stibnite (Sb2S3) flotation concentrate using
The reductive decomposition of a stibnite (Sb2S3) flotation concentrate using elemental iron was investigated in hydrochloric acid.
Leaching of Antimony from Stibnite Ore in KOH Solution for …
Their results indicated that using 1 g Na 2 S and 1 g NaOH per g of pure stibnite can provide an antimony leaching efficiency up to 98–. Ubaldini et al. 17 developed a new process for the extraction of antimony …
Reductive leaching of stibnite (Sb2S3) flotation …
It also presents an alternative route to metal recovery from otherwise intractable mineral ore bodies. In this work, the kinetics of reductively leaching stibnite using metallic iron in a hydrochloric acid medium at varying pH, iron-to-concentrate ratio and temperature, have been investigated.
Stibnite (Sb2S3) oxidative dissolution kinetics from pH 1 to …
Subsequent weathering and leaching of other minerals by acidic drainage waters causes elevated concentrations of a broad range of potentially toxic elements, especially chalcophile elements such as Cd and Pb which are enriched in metal sulfides.