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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 …
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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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According to critical statistical studies, antimony is one of the rarest elements in the world, and global resources could be exhausted by 2050. In light of these observations, its extraction will be costly due to poor-quality ore, deep mining, remote locations, and high energy consumption. In the present study, an alkaline leaching process was carried out on stibnite concentrate to evaluate ...
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Results of preliminary hydrometallurgical tests indicated that leaching of cinnabar-stibnite ores or concentrates with sodium sulfide solution is a potential means of obtaining separate mercury and antimony products. INTRODUCTION Quicksilver has long been noted as …
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Scavnicar S (1960) The crystal structure of stibnite. A redetermination of atomic positions Zeitschrift fur Kristallographie 114 85-97: 1960: synthetic: 0: 293: 0010729: Stibnite: Bayliss P, Nowacki W (1972) Refinement of the crystal structure of stibnite, Sb2S3 Zeitschrift …
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The following components were present in stibnite: Sb2S3, SiO2, ZnS, FeS2. The aim of this study was to establish the effect of composition of the aqueous alkaline leaching medium (1 % NaOH, 1 % NaOH + 1 % Na2S2O3, 1 % NaOH + 1 % Na2S) on the recoveries of Sb, Fe, Pb, Zn, Cu, Ni and Hg.
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4. Antimony is obtained by reacting 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 0.60kg of stibnite and 0.25kg of scrap are heated together to give 0.20kg of the Sb metal.
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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.
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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.
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Reductive leaching of stibnite (Sb2S3) flotation concentrate using metallic iron in a hydrochloric acid medium I: Thermodynamics Hydrometallurgy, Vol. 84, No. 3-4 Electrochemical kinetic study of surface layer growth on natural pyrite in acid medium
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Stibnite (Sb2S3) strongly inhibits cyanidation. The presence of base metal ions such as Fe²+, Fe³+, Ni²+, Cu²+, Zn²+, and Mn²+ in the cyanide leach solution will retard the cyanidation of gold. In some cases the naturally occurring carbonaceous materials in sedimentary-type gold ores act as adsorbents for the gold dissolved by cyanide ...
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Fig. 2(a) to (f). show the leaching-time data for the reductive leaching of stibnite at different initial pH values (0.33 to 0.88) and iron-to-concentrate ratios (0 to 1).. It is important to note that the iron-to-concentrate ratio parameter, defines iron addition to the leaching system, where 0.35 represents the stoichiometric ratio.
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Reductive leaching of stibnite (Sb2S3) flotation concentrate using metallic iron in a hydrochloric acid medium I: Thermodynamics ... demonstrating perhaps that the sulphide matrix is not solely responsible for the refractoriness inherent in stibnite ores. While the reductive leach pre-treatment of stibnite appears to be a less efficient process ...
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WHITE (1967) and WEISSBERG (1969) previously reported stibnite (Sb2S3), but not orpiment (As&), precipitating in the near surface zone of alkaline geothermal systems. INTRODUCTION GEOCHEMISTS HAVE debated whether the arsenic in hot springs is primarily of magmatic origin (ONISHI and SANDELL, 1955; WHITE, 1957) or of rock leaching
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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 expressed as k=206901exp(−16.5/T). Stibnite can be ...
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Oxidation of nonmetallic compounds by T. thiooxidans: Covellite (CuS)Molybdenite(MoS2) Chalcocite (Cu2S) Stibnite (Sb2S3) Sphalerite (ZnS) Cobaltsulfide(CoS) Galena (PbS) Millerite (NiS) MeS +2O2 MeSO4 9. Sulfur minerals can be oxizied by Fe3+ ions and leached by an exclusively geochemical mechanism without the interaction of bacteria.
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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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The most common antimony ore mineral is stibnite (Sb2S3 ), but more than 100 other minerals also contain antimony. The presence of antimony in surface waters and Uses and Applications groundwaters results primarily from rock weathering, soil Antimony has been an important mineral through much runoff, and anthropogenic sources.
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· Stibnite is an antimony trisulphide mineral with the chemical formula Sb2S3. It is a natural mineral source of the chemical element antimony (Sb), which is a lustrous grey metalloid, and it is mined primarily for this reason. ... · This work aims to shed light on the leaching kinetics of antimony from stibnite ore in ...
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Orthorhombic Sb2S3 (stibnite) and its amorphous Sb2S3/C composite were synthesized by solid-state routes, such as heat treatment and high energy mechanical milling (HEMM). X-ray diffraction, X-ray photoelectron spectroscopy and high resolution transmission electron …
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Source: p.402,405-407. Summary: Mining at the Stibnite Gold Project would be accomplished using conventional open pit hard rock mining methods. Mining is planned to deliver 8.05 Mst of ore to the crusher per year (22,050 st/d), with stockpiling by ore type (low …
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Abstract 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 indicated that the leaching efficiency of antimony was higher than 98%, and those of iron and arsenic were about 5.50% and 1.14%, respectively.
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The aqueous speciation and mineralogy of antimony (Sb) in waters and tailings at Beaver Brook antimony deposit have been analyzed to understand Sb mobility during the initial stages of stibnite (Sb2S3) weathering in a near-surface environment. Dissolution of stibnite in oxidizing conditions releases Sb in drainage water and Sb is incorporated into the mineral structures of several secondary ...
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The paper is an overview of alkaline leaching of stibnite by mixed Na2S + NaOH or by NaOH leaching solutions. The behaviour of minor constituents, such as mercury, copper, nickel, iron, lead and zinc in alkaline leaching is also discussed in detail. ... Sminčáková E., Remeteiová D.: Lúhovanie antimónu a sprievodných prvkov Sb2S3 v ...
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Historically the stibnite form was used as a grey pigment in paintings produced in the 16th century. Antimony trisulfide was also used as the image sensitive photoconductor in vidicon camera tubes. It is a semiconductor with a direct band gap of 1.8–2.5 eV. [citation needed] With suitable doping, p and n type materials can be produced.
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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, it often develops a black, iridescent tarnish on exposure to …
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Exploration recommenced in 1974, followed by open pit mining and seasonal heap leaching of oxide gold ores from 1982 to 1997. Geology The Stibnite project area is underlain by pre-Cretaceous "basement" sediments, the Cretaceous-age Idaho Batholith (granitic), Tertiary-age intermediate to felsic intrusions and volcanics, younger
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Elevated dissolved antimony (Sb) and arsenic (As) are common environmental issues around orogenic gold mines. The metalloids occur principally in stibnite (Sb2S3) and arsenopyrite (FeAsS), and are typically accompanied by pyrite (FeS2). Samples of arsenopyrite-rich (≈2.5 wt% As) and stibnite-rich (≈10 wt% Sb) ore were collected from the Globe-Progress mine in the Reefton …
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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 trioxide as end product.
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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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Antimony Leaching from Stibnite and Complex Ores* Leaching and Characterization of Stibnite and Sb-rich Ore Specimens after Accelerated Weathering From the leachate analyses, the net releases of elements of interest from the semi-polished slabs of stibnite and Sb-containing mixed-sulfide ores after 44 days of accelerated weathering at 35oC are calculated per unit mass of the specimens …
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