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Nov 01, 2006 Reductive leaching of stibnite (Sb 2 S 3) flotation concentrate using metallic iron in a hydrochloric acid medium I Thermodynamics Author links open overlay panel T. Mahlangu a F.P. Gudyanga b D.J. Simbi b
Aug 01, 2007 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.
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 ...
Request PDF Reductive leaching of stibnite (Sb2S3) flotation concentrates using metallic iron in a hydrochloric acid medium II Kinetics Reductive leaching of metal sulphides is
Abstract A circulatory hydrometallurgical process ferric trichloride (FeCl3) leaching of antimony sulfide (Sb2S3) (production of Sb by replacing it with iron) followed by membrane electrowinning of ferrous chloride (FeCl2), was developed to cleanly extract Sb from stibnite.
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...
In particular, in the case of stibnite (Sb2S3), the antimony (Sb) forms stable compounds with sodium cyanide (NaCN) during the cyanidation process as
Dec 31, 2018 Leaching Results Stibnite concentrate contains about 90% Sb2S3 content. The remaining 10% portion of the concentrate consists of silica, lead sulphide, iron sulphide, clays and some other minor impurities.
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 40C, has
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.
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 ...
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 of hydrochloric and tartaric acids, mixture of nitric and tartaric acids and hot
Abstract A circulatory hydrometallurgical process ferric trichloride (FeCl3) leaching of antimony sulfide (Sb2S3) (production of Sb by replacing it with iron) followed by membrane electrowinning of ferrous chloride (FeCl2), was developed to cleanly extract Sb from stibnite. First, Sb was leached (leaching efficiency 98%), using FeCl3 as leaching reagent, under the following
Feb 18, 2021 Stibnite (Sb2S3) strongly inhibits cyanidation. The presence of base metal ions such as Fe, Fe, Ni, Cu, Zn, and Mn 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 ...
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 (Sb2S3). The process parameters for the extraction of antimony were optimized on laboratory scale by varying
Aug 01, 2017 Kinetics of leaching of stibnite by mixed Na 2 S and NaOH solutions J Hydrometallurgy , 113 ( 2012 ) , pp. 60 - 66 Article Download PDF View Record in
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 antimony sulfide, high antimony sulfide and oxide).
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
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 ...
Mineral Processing Specialist combining over thirty years of experience including 27 years as a research engineer within the mineral processing laboratory at the National Office of Hydrocarbons and Mines (ONHYM Morocco) Two years as a project manager and extractive metallurgy researcher at Consortium de Recherches Minires (COREM in Quebec city) and about two
A total of 268 thermal spring samples were analyzed for total soluble As using reduced molybdenum-blue 27 of these samples were also analyzed for total Sb using flame atomic absorption spectrometry. At Yellowstone the Cl As atomic ratio is nearly constant among neutral-alkaline springs with Cl 100 mg L-1, and within restricted geographic areas, indicating no
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 al., 2000b).
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. ... Sminkov E., Remeteiov D. Lhovanie antimnu a sprievodnch prvkov Sb2S3 v ...
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.
How Antimony is Processed by Flotation. The problem discussed in this antimony process study is limited to a concentrator capable of beneficiating 150 tons per day of antimony ore.The antimony in this study occurs as the mineral stibnite (Sb2S3) in association with small amounts of pyrite, arsenopyrite, galena and lead sulfantimonides.
Dec 01, 1996 A new crystal structure is found to exist for stibnite which is orthorhombic, Pmmm. In this structure all the antimony and sulphur atoms have only one type of coordination, namely, trivalent and diavalent, respectively. They form a honey-comb-like planar network which is parallel to the xz-plane and stacked along the y-axis with the middle plane slightly displaced along the
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.
Dec 01, 2000 The aim of this work concerns the recovery of gold by a combined biometallurgical and hydrometallurgical treatment. The biooxidation of a refractory gold-bearing stibnite (antimony sulphide) favours the increase of gold recovery during the subsequent hydrometallurgical process (cyanidation, adsorption onto activated carbon, desorption from activated carbon and
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
02.DB.05a Stibnite Sb2S3 Pbnm 2/m 2/m 2/m Other Stibnite Information References NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) See Also Links to other databases for Stibnite 1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries Mineral Gallery 3 - Athena 4 - Franklin Minerals(Dunn) 5 ...
May 23, 2018 Table of ContentsRoastingArsenic LeachingArsenic and Sulfate PrecipitationAntimony ReductionAntimony Oxide ProductionArsenopyrite Soda Ash RoastingArsenic LeachingArsenic Precipitation The ability to process complex precious metal sulfide concentrates containing antimony and arsenic, in an economic and environmentally
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
Stibnite (February 15th, 2016) Here we go Mineral Monday again, and this week we have Stibnite (Sb2S3). Stibnite is actually a fairly common mineral in hydrothermal systems, although it is rarely found in large deposits.
Muhammad Arif Bhatti et al., J.Chem.Soc.Pak., Vol. 40, No. 06, 2018 1035 Oxidative Chlorination Leaching of Stibnite Using Acidic Ferric Chloride Lixiviant 1Muhammad Arif Bhatti*, 2Ahmad Adnan, 3Abdul Ahad, 1Kamran Raza Kazmi and 1Adnan Akram 1Mineral Processing Research Centre, PCSIR Laboratories Complex, Lahore-54600, Pakistan. 2Department of Chemistry,
the solvent for Stibnite to form a solution of sul-phantimonite and sulphantimonate and electrolyzing the solution by the use of inSoluble anodes. 2 Koepp leached the Stibnit with a solution of ferric ohloride according to the equation 6 FeOlaSb2S3 .6F,e0122 SbC13-r3S and electro1yed the solution at 500 C., using lead electrodes.