In particular, in the case of stibnite (Sb2S3), the antimony (Sb) forms stable compounds with sodium cyanide (NaCN) during the cyanidation process; as a consequence, cyanide consumption increases ...
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D. J. Simbi's 22 research works with 540 citations and 2,678 reads, including: Reductive leaching of stibnite (Sb2S3) flotation concentrates using metallic iron in a hydrochloric …
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Mentioning: 5 - Reductive leaching of stibnite (Sb2S3) flotation concentrates using metallic iron in a hydrochloric acid medium II: Kinetics - Mahlangu, T., Gudyanga, F.P., Simbi, D.J.
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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 ...
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The solubility of stibnite ( Sb2S3) was measured at 25°C and 1 atmosphere in solutions ranging from 0.45 to 7.16 percent Na2S by weight. ... Laboratory leaching tests of natural stibnite ...
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Abstract. Read online. The objective of this research was to study the kinetic aspects of natural stibnite leaching in NaOH aqueous solutions. The experimental results obtained …
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The reductive decomposition of a stibnite (Sb2S3) flotation concentrate using elemental iron was investigated in hydrochloric acid. The leaching process which proceeded via both reductive and non ...
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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 ...
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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 chloride …
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The solubility of stibnite ( Sb2S3) was measured at 25°C and 1 atmosphere in solutions ranging from 0.45 to 7.16 percent Na2S by weight. Sb2S3: Na2S mole ratios of saturated solutions range from ...
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Abstract. In this study, the dissolution of stibnite, Sb2S3, which is an antimony ore, in HCl solutions was investigated, taking into consideration the effect of particle size, acid concentration ...
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In this study, we proposed vacuum method for recovery antimony from low-grade stibnite and produce Sb 2 S 3 from high-grade stibnite. The first part of this …
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Define stibnite. stibnite synonyms, stibnite pronunciation, stibnite translation, English dictionary definition of stibnite. n. A lead-gray mineral, Sb2S3, that is the chief source of antimony. ... The developed process includes oxidative chlorination leaching of stibnite (Sb2S3) concentrate assaying 64.86% Sb prepared from indigenous low-grade ...
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Laboratory leaching tests of natural stibnite (containing Sb2S3, SiO2, ZnS and FeS2) with NaOH or NaOH – Na2S solution were carried out. Antimony recovery in …
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Smincáková (2009) showed that the leaching of stibnite by sodium hydroxide was possible. Baláž (2000) showed that proustite (Ag 3 AsS 3 ) and pyrargrite (Ag 3 SbS 3 ) decompose during the ...
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Stibnite is a sulfide minerals with chemical composition is antimony sulfide (Sb2S3). The principal ore of antimony. Lead-gray to silvery gray in color. ... Stibnite Uses. Pastes of Sb2S3 powder in oil or other substances ca. Eye cosmetics within the center East are 3000 BC and more; on this embodiment, Sb2S3 is called kohl. ...
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It also presents an alternative route to metal recovery from otherwise intractable mineral ore bodies. In this work, the kinetics of reductively leaching stibnite …
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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 ...
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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.
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Question: Q1: Antimony is obtained by heating pulverized stibnite (Sb2S3 ) with scrap iron and drawing off the molten antimony from the bottom of the reaction vessel: Sb2S3 + 3Fe + 2Sb + 3Fes Suppose that 0.600 kg of stibnite and 0.250 kg of iron turnings are heated together to give 0.200 kg of Sb metal. Determine a. The limiting reactant b. The …
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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 ...
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This paper presents results of the laboratory investigation of alkaline leaching of stibnite that is an important mineral occuring in the antimony-bearing... DOAJ is a unique and …
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Stibnite, an antimony sulphide (Sb 2 S 3), is the most important and abundant antimony ore exploited for the recovery of antimony and precious metals, gold and silver. …
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The leaching of galena at pH values lower than 0.43 p... View Reductive-oxidative pretreatment of a stibnite flotation concentrate: Thermodynamic and kinetic considerations
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Leaching The leaching was investigated in a 500 ml glass reactor into which 150 ml of leaching solution and 0.5 g of stibnite were added. This leaching was per- formed at temperatures of 293-345 K. Aliquots ( 1 ml) of the solution were withdrawn at appropriate time intervals for determination of the content of dissolved antimony by atomic ...
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The direct oxidation of stibnite (Sb2S3) using a gas mixture of nitrogen-oxygen was investigated in a pilot plant. Steady-state pilot operation of 5 and 10 t/d was normally observed during the pilot test of 100 days, and a cleaning experiment of high-antimony molten slag from oxygen- enriched bottom-blown was tested by direct reduction in a ...
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At the first stage of hydrometallurgical processing of stibnite (Sb2S3), i. e. its leaching, the following acidic leaching media are commonly applied: mixture of hydrochloric and tartaric acids ...
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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.
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A pretreatment with lead nitrate reduced the extent of gold surface coating by Ag, Fe and S. Stibnite, at a concentration as low as 20 ppm, significantly affected the gold leaching kinetics ...
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This paper presents the results of the laboratory investigation of alkaline leaching of stibnite (Sb2S3) sample, which originated from Pezinok (Slovakia) mine. The leaching media used in this study were aqueous solutions containing sodium hydroxide. Establishing the effect of the following parameters on alkaline leaching: NaOH concentration, …
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This paper is concerned with the kinetics of stibnite (Sb2S3) dissolution in H2SO4-NaCl-Fe(SO4)1.5-O2 solutions. ... The pressure leaching of enargite in FeSO4-H2SO4-O2 media was studied with the ...
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Kinetics of Sb2S3 leaching in NaOH solution. December 2007; Acta Montanistica Slovaca 12(4) 12(4)
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The reductive decomposition of a stibnite (Sb2S3) flotation concentrate using elemental iron was investigated in hydrochloric acid. The leaching process which …
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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 ...
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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 ...
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