A hydrometallurgical process was developed for the preparation of commercial grade antimony xide (Sb2O3) from indigenous antimony ore. The developed process includes oxidative chlorination leaching of stibnite (Sb2S3) concentrate assaying 64.86% Sb prepared from indigenous low-grade ore containing 20.16% Sb using ferric …
Antimony release and isotope fractionation during leaching of stibnite (Sb 2 S 3 ): An experimental... January 2023. ... (FeSb2S4), stibnite (Sb2S3), and valentinite (Sb2O3) with the heaviest ...
This paper presents the results of a laboratory investigation of alkaline leaching of stibnite sample, which originated from Pezinok (Slovakia) mine. The leaching media used was aqueous solution containing sodium hydroxide. This research focused on establishing the effect of the following parameters on alkaline leaching: NaOH …
The proposed reactions of leaching and oxidation referring to stibnite (Sb2S3) and pyrite (FeS2) in hydrochloric acid dissolution by the authors are shown in Eqs.
Laboratory leaching tests of natural stibnite (containing Sb2S3, SiO2, ZnS and FeS2) with NaOH or NaOH – Na2S solution were carried out. Antimony recovery in NaOH leaching was lower than that with Na2S – NaOH solutions (1:1). A decrease in particle size led to higher antimony recovery.
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. The leaching data was then analysed using the initial rate theory and the unreacted shrinking core model in order to explain the leaching mechanisms as ...
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The objective of the research study presented in this paper was to determine, under laboratory conditions, antimony recoveries in alkaline leaching of the stibnite (Sb2S3) sample originated from ...
Kinetics of leaching of stibnite by mixed Na 2 S and NaOH solutions Pavel Raschman ⁎, Emília Smin č áková Faculty of Metallurgy, Technical University of Ko š ice, Letná 9, 042 00 Ko š ice, Slovak Republic abstract article info Article history: Received 1 February 2011 Received in revised form 27 August 2011 Accepted 28 November 2011 ...
The Sb isotope compositions of sulfides and secondary Sb minerals formed on the primary stibnite [Sb 2 S 3] or in mine tailings grains were compared with each other. Furthermore, we experimentally investigated Sb isotope fractionation during stibnite leaching with different acids.
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 …
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 …
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 …
This paper presents results of the laboratory investigation of alkaline leaching of stibnite that is an important mineral occuring in the antimony-bearing raw materials.
Semantic Scholar extracted view of "Ferric chloride leaching of antimony from stibnite" by Long-gang Ye et al.
Laboratory leaching tests of natural stibnite (containing Sb2S3, SiO2, ZnS and FeS2) with NaOH or NaOH - Na2S solution were carried out. Antimony recovery in NaOH leaching was lower than that with ...
The objective of the research study presented in this paper was to determine, under laboratory conditions, antimony recoveries in alkaline leaching of the stibnite (Sb2S3) sample originated from ...
In the present study, an alkaline leaching process was carried out on stibnite concentrate to evaluate the effect of reaction parameters on the percentage of antimony extraction.
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, …
The Sb isotope compositions of sulfides and secondary Sb minerals formed on the primary stibnite [Sb 2 S 3] or in mine tailings grains were compared with each other. Furthermore, we experimentally investigated Sb isotope fractionation during stibnite leaching with different acids.
This work aims to shed light on the leaching kinetics of antimony from stibnite ore in potassium hydroxide (KOH) solution. Response surface methodology based on central composite design was used to investigate the effect of time, temperature, solid to liquid ratio (S/L), and KOH concentration as independent parameters on the leaching …
Experimental work on the oxidation of stibnite (Sb2S3) was carried out at temperatures between 350 and 500°C and oxygen partial pressures between 1.01 and 21.28 kPa by using a thermogravimetric analysis method. The oxidation rate of stibnite was significantly influenced by both temperature and partial pressure of oxygen. Stibnite oxidized in one …
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 …
Investigation of the characteristics of stibnite (Sb2S3) flotation tailings and extraction of critical metals (Sb and As): Optimization and scale-up. ... This work aims to shed light on the leaching kinetics of antimony from stibnite ore in potassium hydroxide (KOH) solution.
This work aims to shed light on the leaching kinetics of antimony from stibnite ore in potassium hydroxide (KOH) solution. Response surface methodology based on central composite design was used ...
The developed process includes oxidative chlorination leaching of stibnite (Sb2S3) concentrate assaying 64.86% Sb prepared from indigenous low-grade ore containing 20.16% Sb using ferric chloride (FeCl3) solution in acidic medium as lixiviant followed by purification, precipitation and crystallization of antimony xide as end product.
The calculated values of the kinetic parameters indicate that the leaching process is controlled by both the intrinsic chemical reaction between Sb2S3 and Na2S at the liquid/solid interface and ...
The objective of the research study presented in this paper was to determine, under laboratory conditions, antimony recoveries in alkaline leaching of the stibnite (Sb2S3) sample originated from ...
The reductive decomposition of a stibnite (Sb 2 S 3) flotation concentrate using elemental iron was investigated in hydrochloric acid.The leaching process which proceeded via both reductive and non-oxidative chemical decomposition reactions achieved desulphurisation in excess of 95% to produce elemental and dissolved antimony …
The developed process includes oxidative chlorination leaching of stibnite (Sb2S3) concentrate assaying 64.86% Sb prepared from indigenous low-grade ore containing 20.16% Sb using ferric chloride (FeCl3) solution in acidic medium as lixiviant followed by purification, precipitation and crystallization of antimony xide as end product.
The kinetics of oxidative dissolution of natural stibnite (Sb2S3) under environmentally relevant conditions is investigated. The effects of hydrogen ion activity (pH 1.08–10.63), dissolved ...
The volatilization of stibnite (Sb2S3) in nitrogen from 700 to 1000 °C was investigated by using thermogravimetric analysis. The results indicate that in inert atmosphere, stibnite can be volatilized most efficiently as Sb2S3 (g) at a linear rate below 850 °C, with activation energy of 137.18 kJ/mol, and the reaction rate constant can be …
Semantic Scholar extracted view of "Stibnite (Sb2S3) oxidative dissolution kinetics from pH 1 to 11" by M. Biver et al.
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.
Semantic Scholar extracted view of "Kinetics of leaching of stibnite by mixed Na2S and NaOH solutions" by P. Raschman et al.
This study investigated the leaching and electrowinning of antimony from a complex, high arsenic and gold-containing stibnite concentrate ore (As-Au-Sb ore) using slurry electrolysis (SE).
The results show that the leaching efficiency (%) of antimony increases with the temperature (from 35 °C to 65 °C) and hydrochloric acid concentration (from 3.0 mol/L to 4.5 mol/L). ... In regard to the materials used, Sb2S3 (stibnite) was obtained from Aldrich Chemical Co. (St. Louis, MO) and was a fine powder with 96 pct Sb2S3, and nitrogen ...
Stibnite + Dioxygen = Antimony xide + Sulfur Dioxide. Sb2S3 + O2 = Sb2O3 + SO2 is a Double Displacement (Metathesis) reaction where two moles of Stibnite [Sb 2 S 3] and nine moles of Dioxygen [O 2] react to form two moles of Antimony xide [Sb 2 O 3] and six moles of Sulfur Dioxide [SO 2]
The developed process includes oxidative chlorination leaching of stibnite (Sb2S3) concentrate assaying 64.86% A hydrometallurgical process was developed for the preparation of commercial grade antimony xide (Sb2O3) from indigenous antimony ore.
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, …
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