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LEACHING OF STIBNITE IN NaOH SOLUTIONS

its effect on leaching in mixed Na2S + NaOH solution. KEYWORDS: antimony, alkaline leaching, stibnite, recovery 1. INTRODUCTION At the first stage of hydrometallurgical processing of stibnite (Sb2S3), i. e. its leaching, the following acidic leaching media are commonly applied: mixture ofFerric chloride leaching of antimony from stibnite,,Jun 01, 2019· A circulatory hydrometallurgical process: ferric trichloride (FeCl 3) leaching of antimony sulfide (Sb 2 S 3) (production of Sb by replacing it with iron) followed by membrane electrowinning of ferrous chloride (FeCl 2), was developed to cleanly extract Sb from stibnite.First, Sb was leached (leaching efficiency >98%), using FeCl 3 as leaching reagent, under the following optimum conditions,Optimisation of Pure Stibnite Leaching Conditions by,,leaching agents can be used to solubilise Sb from stibnite ores (Sb2S3): mixture of hydrochloric and tartaric acids, mixture of nitric and tartaric acid and hot concentrated sulphuric acid (Havlik et al., 1991; Ubaldini et al., 2000b). Stibnite can be leached by alkaline solutions of Na2S and NaOH (Ubaldini et

Investigation of Alkaline Leaching Parameters on Stibnite,

Jul 27, 2020· Concentration of Sb in stibnite concentrate. C t: Concentration of Sb in solution after leaching for time t. T: Leach time (min) k: Rate constant. A: Frequency factor (min −1) E a: Activation energy of the reaction (kJ mol −1) R: Universal gas constant (8.314 J mol −1 K −1) T: Absolute temperature (K) X: Fraction of leached antimony in,Reductive leaching of stibnite (Sb2S3) flotation,,Nov 01, 2006· 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 species, ferrous ions and hydrogen sulphide gas.Oxidative Chlorination Leaching of Stibnite Using Acidic,,chlorination leaching of stibnite (Sb 2 S 3) concentrate assaying 64.86% Sb prepared from indigenous low-grade ore containing 20.16% Sb using ferric chloride (FeCl 3) solution in acidic medium as lixiviant followed by purification, precipitation and crystallization of antimony trioxide as end product. An effort was made to investigate the,

(PDF) Leaching of stibnite in NaOH solutions

This paper presents the results of the laboratory investigation of alkaline leaching of stibnite (Sb 2 S 3) sample, which originated from Pezinok (Slovakia) mine. The leaching media used in this,Antimony Leaching from Stibnite and Complex Ores*,ANTIMONY LEACHING FROM STIBNITE AND COMPLEX ORES1 Y.T. John Kwong2, Allen Pratt2 and Gianluigi Botton2 Abstract. To shed light on the leaching of Sb from mine wastes containing stibnite, two series of experiments were conducted. In one experiment, polished slabs of a museum-grade stibnite and a mixed-sulfide ore sample containing 28% Sb were(PDF) Leaching of Natural Stibnite using Sodium Hydroxide,,This paper presents the results of the laboratory investigation of alkaline leaching of stibnite (Sb 2 S 3) sample, which originated from Pezinok (Slovakia) mine. The leaching media used in this,

Kinetics of leaching of stibnite by mixed Na 2 S and NaOH,

Feb 01, 2012· where α = conversion of antimony (i.e., the fraction of antimony dissolved), t = leaching time, t Ri = time for complete conversion of the stibnite-ore particle, R = original radius of the stibnite-ore particle, ρ S = molar concentration of Sb 2 S 3 in the stibnite ore, k = apparent reaction-rate constant for surface chemical reaction , c,Optimisation of Pure Stibnite Leaching Conditions by,,leaching agents can be used to solubilise Sb from stibnite ores (Sb2S3): mixture of hydrochloric and tartaric acids, mixture of nitric and tartaric acid and hot concentrated sulphuric acid (Havlik et al., 1991; Ubaldini et al., 2000b). Stibnite can be leached by alkaline solutions of Na2S and NaOH (Ubaldini et(PDF) Leaching of Natural Stibnite using Sodium Hydroxide,,This paper presents the results of the laboratory investigation of alkaline leaching of stibnite (Sb 2 S 3) sample, which originated from Pezinok (Slovakia) mine. The leaching media used in this,

Antimony Leaching from Stibnite and Complex Ores*

ANTIMONY LEACHING FROM STIBNITE AND COMPLEX ORES1 Y.T. John Kwong2, Allen Pratt2 and Gianluigi Botton2 Abstract. To shed light on the leaching of Sb from mine wastes containing stibnite, two series of experiments were conducted. In one experiment, polished slabs of a museum-grade stibnite and a mixed-sulfide ore sample containing 28% Sb wereBEHAVIOUR OF STIBNITE IN ALKALINE LEACHING,Leaching of natural stibnite (Sb2S3) that occurs together with other minerals such as quartz (SiO2), pyrite (FeS2) and wurtzite (ZnS) is a very important unit operation in which antimony passes into the leaching solution. Leaching is controlled by thermodynamic and kinetic aspects. From theKINETIC STUDY OF LEACHING STIBNITE IN SODIUM,a) recovery of antimony during agitation leaching of natural stibnite at different: ¾. Particle size of solid phase ¾Temperature ¾Leaching time ¾NaOH concentration in leaching solution b) choosing of suitable mathematical model of leaching of natural stibnite (Sb2S3) by sodium hydroxide. 2. EXPERIMENTAL

LEACHING OFSTIBNITEBYMIXEDNa2SANDNaOHSOLUTIONS

Sb2S3 + 6NaOH = Na3SbS3 + Na3SbO3 + 3H2O (2) Reactions (1) and (2) describe the process of Sb2S3 leaching in alkaline solutions [13]. The resulting leaching solution is a complex system containing various species (Sb, S, Na), which upon reaction withProcess flow-sheet for gold and antimony recovery from,,Oct 01, 2000· Different leaching agents can be used for treatment of stibnite (Sb 2 S 3) ore: mixture of hydrochloric and tartaric acids, mixture of nitric and tartaric acid and hot concentrated sulfuric acid . Sb 2 S 3 can be dissolved also by alkaline solutions, which consists of sodium sulfide (Na 2 S) and sodium hydroxide (NaOH) [2] , [5] .Leaching of Antimony from Stibnite Ore in KOH Solution for,,Jan 13, 2021· 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 efficiency of antimony.

(PDF) Effect of selected parameters on stibnite,

to verify the effect of HCl concentration, temperature, liquid to solid Leaching of stibnite concentrates by mixed Na2S and NaOH solutions ratio (L/S) and gas flow rate on antimony extraction rate, and to explore was proposed by previous researchers (Raschman and Sminčáková, the role of ferric chloride and sodium chloride in the leaching,Stibnite: The mineral stibnite information and pictures,Stibnite is named after the latin stibium, which is the old name of the element antimony (Sb). Stibnite was and continues to be the primary ore of antimony. Stibnite forms some of the most outstanding natural crystals that exist, in way of sharpness, luster, and size.It can form in groups of huge metallic lustered crystals that are elegantly crafted and exceptionally shiny.KINETIC STUDY OF LEACHING STIBNITE IN SODIUM,According to the theoretical background of alkaline leaching in hydrometallurgy of antimony, the leaching process proceeds according the following reaction [8]: Sb2S3 + 3 Na2 S = 2 Na3SbS3 ΔG˚298= - 71.41 kJ (1) A negative value of standard Gibbs energy indicates that this reaction is thermodynamically feasible and spontaneous.

(PDF) Leaching of Natural Stibnite Using Na2S and NaOH,

The kinetics of the reaction between particulate stibnite and mixed Na 2 S + NaOH solutions were studied. The effects of the concentration of the Na 2 S and NaOH (from 0.5% to 2.0%), temperature,(PDF) Leaching of the antimony and accompanying of,,Leaching of the antimony and accompanying of elements Sb2S3 in the alkaline mediumNon-oxidative leaching of mechanically activated stibnite,Hydrometallurgy, 31 (1992) 201-212 201 Elsevier Science Publishers B.V., Amsterdam Non-oxidative leaching of mechanically activated stibnite P. Bal~i~a, J. Brian~inb, V. ~epelfika, T. H a v l i k c a n d M. Skrobian c aMining Institute of the Slovak Academy of Sciences, 043 53 Ko~ice, Czechoslovakia blnstitute of Experimental Metallurgy of the Slovak Academy of Sciences, 043 57 Ko~ice,

BEHAVIOUR OF STIBNITE IN ALKALINE LEACHING

Leaching of natural stibnite (Sb2S3) that occurs together with other minerals such as quartz (SiO2), pyrite (FeS2) and wurtzite (ZnS) is a very important unit operation in which antimony passes into the leaching solution. Leaching is controlled by thermodynamic and kinetic aspects. From theKINETIC STUDY OF LEACHING STIBNITE IN SODIUM,a) recovery of antimony during agitation leaching of natural stibnite at different: ¾. Particle size of solid phase ¾Temperature ¾Leaching time ¾NaOH concentration in leaching solution b) choosing of suitable mathematical model of leaching of natural stibnite (Sb2S3) by sodium hydroxide. 2. EXPERIMENTALKINETIC STUDY OF LEACHING STIBNITE IN SODIUM,According to the theoretical background of alkaline leaching in hydrometallurgy of antimony, the leaching process proceeds according the following reaction [8]: Sb2S3 + 3 Na2 S = 2 Na3SbS3 ΔG˚298= - 71.41 kJ (1) A negative value of standard Gibbs energy indicates that this reaction is thermodynamically feasible and spontaneous.

Oxidative Chlorination Leaching of Stibnite Using Acidic,

Dec 31, 2018· 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 trioxide as end product.Leaching of Antimony from Stibnite Ore in KOH Solution for,,Jan 13, 2021· 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 efficiency of antimony.Non-oxidative leaching of mechanically activated stibnite,Hydrometallurgy, 31 (1992) 201-212 201 Elsevier Science Publishers B.V., Amsterdam Non-oxidative leaching of mechanically activated stibnite P. Bal~i~a, J. Brian~inb, V. ~epelfika, T. H a v l i k c a n d M. Skrobian c aMining Institute of the Slovak Academy of Sciences, 043 53 Ko~ice, Czechoslovakia blnstitute of Experimental Metallurgy of the Slovak Academy of Sciences, 043 57 Ko~ice,

KINETICS OF STIBNITE (S b S ) OXIDATION AT ROASTING,

Antimony’s main stable mineral is stibnite (Sb 2 S 3) and few studies have been reported on the rate of oxidation-volatilization of this mineral at roasting or higher temperatures. On this matter, Komorova et al. [4] studied the vaporization of several antimony containing compounds, among them synthetic Sb 2 S 3, in nitrogen atmosphere using,stibnite sbs compounds - captain-sarah.de,stibnite sbs compounds. The crystal structure of stibnite sbs, pnma, a, b, c , v at k was refined in situ at , , and k it is a major characteristic of the structure that the sbs secondary bonds enclosing sb s inert lonepair electrons at k are significantly shorter than the corresponding sum of the sb and s van der waals radii concerning theStibnite - Wikipedia,Stibnite, sometimes called antimonite, is a sulfide mineral with the formula Sb 2 S 3.This soft grey material crystallizes in an orthorhombic space group. It is the most important source for the metalloid antimony. The name is from the Greek στίβι stibi through the Latin stibium as the old name for the mineral and the element antimony.

Stibnite: The mineral stibnite information and pictures

Stibnite is named after the latin stibium, which is the old name of the element antimony (Sb). Stibnite was and continues to be the primary ore of antimony. Stibnite forms some of the most outstanding natural crystals that exist, in way of sharpness, luster, and size.It can form in groups of huge metallic lustered crystals that are elegantly crafted and exceptionally shiny.Metal Extraction Process for High Grade Stibnite of Kharan,,A rapid and simple process has been developed for the recovery of antimony metal from stibnite ore of Kharan area (Balochistan) of Pakistan. The ore was characterized by X-ray diffraction (XRD) technique and found to contain 66% stibnite i.e. antimony sulfide (Sb 2 S 3).The process parameters for the extraction of antimony were optimized on laboratory scale by varying reaction temperature from,Gold/Silver Heap Leaching and Management Practices That,,Cyanicides include arsenic-bearing minerals such as realgar (As^S^) and orpiment (As^g), and others, such as stibnite (Sb^S,), that react rapidly with cyanide and inhibit dissolution of gold; carbonaceous materials that act as adsorbents for dissolved gold; base metal ions, such as Fe2+, Fe3+, Ni , Cu , Zn , and Mn +, which retard cyanidation,

(PDF) Process flow-sheet for gold and antimony recovery,

Different leaching agents can be used for treatment of stibnite ŽSb 2 S 3 . ore: mixture of hydro- Generally, extraction and recovery of antimony chloric and tartaric acids, mixture of nitric and tar- are realised by pyrometallurgy, which involves the taric acid and hot concentrated sulfuric acid w4x. evolution of toxic gases into the,The Impact of Physical Properties on the Leaching of,,For Sb and As, values reached >1800 mg·kg−1 and >1200 mg·kg−1, respectively (>600 and >90 times higher than the soil background). The leaching of Sb, As, Hg, Pb, Cd and Zn decreased with an increase in grain size and leachable portions of metal ranged between 0.01% to 1.56% of total PTE content.,