minéralurgie sulfure

  • Minéralurgie Géophysique Hydrogéologie, réhabilitation et

    Minéralurgie 2015 Ensemble des techniques de traitement de matières minérales brutes ayant pour objet d‘extraire par voie physique, chimique ou thermique, une concentration de minerai (initialement disséminer dans la roche du gîte minéral) directement utilisables par l'industrie ou

  • Isotopes of sulfur Wikipedia

    The preponderance of sulfur-32 is explained by its production from carbon-12 plus successive fusion capture of five helium-4 nuclei, in the so-called alpha process of exploding type II supernovas (see silicon burning). Other than 35 S, the radioactive isotopes of sulfur are all comparatively short-lived.

  • Standard atomic weight A(S): [32.059, 32.076], Conventional: 32.06
  • MINERALOGY AND SULFIDE MINERAL CHEMISTRY OF THE

    the Neves–Corvo ores through a comparison with the mineralogy and mineral chemistry data from other VMS deposits, mainly those in the Iberian Pyrite Belt (IPB) and at Kidd Creek, Ontario. THE NEVES–CORVO DEPOSIT Neves–Corvo is the only volcanogenic massive sul-fide deposit in the IPB currently in operation in Portu-gal.

  • Published in: Canadian Mineralogist · 2002Authors: Orlando C Gaspar
  • Spatial distribution of iron and sulphur species on the

    Abstract XPS, DRIFTS, UV spectroscopy and HPLC were used to investigate the nature and spatial distribution of oxidized superficial phases present on pyrite surfaces. Two pure pyrites with different arsenic contents were used.

  • Published in: Applied Surface Science · 1993Authors: Ph De Donato · Christian Mustin · R Benoit · R ErreAffiliation: Ecole Normale Superieure · Centre National De La Recherche ScientifiqueAbout: Spatial distribution · Pyrite · Chromatography · Inorganic compound
  • PYROLYSIS OF RUBBER AMD TYRES WASTE

    The more employed processes of vuLcanization use sulphur or peroxydes. The sulphur vulcanization is the more common way of crosslinking because it is applicable to all elastomers bearing double-linkages. To increase the cinetic of the reaction producing carbon-sulphur linkages, catalysts (or accelerators) and other adjuvants must be added.

  • Sulfur Names and nicknames for Sulfur

    Sulfur is flammable, corrosive, and damaging to the health of anything that breathes it in. Sulfur can cause damage not only to individual organisms, but also can be dangerous on an environmental level if it is dissipated across certain areas. However, sulfur is a necessary part of life.

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  • Collection « La mine en France PDF Free Download

    une origine endogène : il s’agit de gaz contenus dans le gisement et/ou dans les roches encaissantes avant l’exploitation. Il s’agit classiquement du méthane, de ses homologues supérieurs, du dioxyde de carbone, du radon et bien plus rarement d’autres gaz (azote, hydrogène, argon, sulfure d’hydrogène, etc.).

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  • Flotation of Silicates Gangue from hematite containing

    Names 2007, 3rd France-Russia Seminar pp. 123-126 DOI: 10.1051/names2007043 Flotation of Silicates Gangue from hematite containing products I. Filippova 1, 2, L. Filippov 1, 2 and V. Severov 1, 2 1 Laboratoire Environnement et Minéralurgie (LEM), Nancy-Université, CNRS, Rue du Doyen Roubault B.P. 40, F-54501 Vandoeuvre-les-Nancy, France 2 Moscow Institute Steel

  • Adsorption of a lignosulphonate polymer onto PVC and PET

    As the 'rest' method is not sufficiently sensitive for this purpose, X-ray Photoelectron Spectroscopy analysis was conducted. A method of calculating the surface coverage of both plastics by the reagent is proposed based on the fact that the lignosulphonate contains sulphur whereas PVC and PET do not.

  • Recovery of Co, Ni, Mo, and V from unroasted spent

    They also contain up to 25 pct of carbon, hydrocarbons, and sulfur. Selective chlorination of raw, unroasted samples with Cl 2 + air, Cl 2 + N 2, and Cl 2 + CO + N 2 gas mixtures have been investigated for the recovery of valuable elements. The fastest chlorination kinetics are obtained using the Cl 2 + CO + N 2 gas mixture, followed by Cl 2 + N 2.

  • Published in: Metallurgical and Materials Transactions B-process Metallurgy and Materials ProcessiAuthors: I Gaballah · M DjonaAffiliation: Centre National De La Recherche ScientifiqueAbout: Cobalt · Nitrogen · Chemical reaction · Molybdenum · Catalysis · Nickel
  • Surface sulphur as promoting agent of pyrite leaching by

    Abstract. Methanol extraction conducted with a HPLC-Iike device and spectroscopic analysis were used to remove and characterize the sulphur layer (S 8) present on freshly ground pyrite surface after dry grinding.Accurate measurements of ferric and sulphate contents in the leachate showed a significant delay in the lag phase and in the first step of oxidation by Thiobacillus

  • Influence of high-power electromagnetic pulses on surface

    The transformation mechanism of FeS 2 under the treatment by the high-power pulses depends on the treatment conditions (dry or wet) and besides it depends on the number of the pulses. Fig.2.Photomicrography of FeS 2 grains before and after treatment by electromagnetic pulses (number of treatment -15 000 pulses): «gypsumed» pyrite.

  • Corrosion and Electrochemical Oxidation of a Pyrite by

    Abstract. The oxidation of a pure pyrite by Thiobacillus ferrooxidans is not really a constant phenomenon; it must be considered to be more like a succession of different steps which need characterization. Electrochemical studies using a combination of a platinum electrode and a specific pyrite electrode (packed-ground-pyrite electrode) revealed four steps in the

  • Tureng ore Fransızca İngilizce Sözlük

    English French online dictionary Tureng, translate words and terms with different pronunciation options. ore fini calculation of ore reserves calcul des réserves de minerai

  • Influence of high-power electromagnetic pulses on surface

    The transformation mechanism of FeS 2 under the treatment by the high-power pulses depends on the treatment conditions (dry or wet) and besides it depends on the number of the pulses. Fig.2.Photomicrography of FeS 2 grains before and after treatment by electromagnetic pulses (number of treatment -15 000 pulses): «gypsumed» pyrite.

  • Adsorption of a lignosulphonate polymer onto PVC and PET

    As the 'rest' method is not sufficiently sensitive for this purpose, X-ray Photoelectron Spectroscopy analysis was conducted. A method of calculating the surface coverage of both plastics by the reagent is proposed based on the fact that the lignosulphonate contains sulphur whereas PVC and PET do not.

  • Corrosion and Electrochemical Oxidation of a Pyrite by

    Abstract. The oxidation of a pure pyrite by Thiobacillus ferrooxidans is not really a constant phenomenon; it must be considered to be more like a succession of different steps which need characterization. Electrochemical studies using a combination of a platinum electrode and a specific pyrite electrode (packed-ground-pyrite electrode) revealed four steps in the bioleaching process.

  • Hydrothermal Sulfidation of White Lead with Elemental Sulfur

    Hydrothermal sulfidation of pure white lead with elemental sulfur has been studied in the present paper. The variables considered in the study were temperature, time, particle size and elemental sulfur fraction in the reacting mixture. Temperature and time were the most two important factors, with an increase in temperature and holding time the sulfidation extent of lead improved greatly and

  • Corrosion and electrochemical oxidation of a pyrite by

    The oxidation of a pure pyrite by Thiobacillus Ferrooxidans is not really a constant phenomenon; it must be considered to be more like a succession of different steps which need characterization. Electrochemical studies using a combination of a platinum electrode and a specific pyrite electrode

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  • Tureng ore Fransızca İngilizce Sözlük

    English French online dictionary Tureng, translate words and terms with different pronunciation options. ore fini calculation of ore reserves calcul des réserves de minerai

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  • KLJKSRZHUHOHFWURPDJQHWLFSXOVHV +3(03

    ) and gaseous sulphur oxides (mainly SO 2) that react with CaCO 3 to form CaSO 4: CaCO 3 + SO 2 + 1/2O 2 → CaSO 4 + CO 2 Simultaneously, the absorption bands of carbonate group of calcite decreased considerably (1795, 1421, 874, 713 cm-1). An increased intensity of stretching and bending of OH-groups vibration of the sulphates crystal

  • Informačné technológie v oblasti kontroly čistoty ovzdušia

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  • Effect of regrinding and pulp aeration on the flotation of

    Effect of regrinding and pulp aeration on the flotation of chalcopyrite in chalcopyrite/pyrite mixtures. the hydrophobic species of polysulphide and elemental sulphur which have been shown to exist on the Cp surface and be responsible for Cp flotation in the absence of (15th Congres International de Mineralurgie) (1985), pp. 198-210.

  • Acid and Oxidizing Leaching of Chalcopyrite Concentrate by

    A hydrometallurgical treatment was applied to the Hajar Mine Copper Concentrate (HMCC), Morocco, containing ≈ 28.1% copper (the major copper mineral phase is chalcopyrite, CuFeS2), ≈ 26.1% iron, ≈ 5.8% zinc, ≈ 1.9% lead, ≈ 33.7% sulphur, and small amounts of silver (269 g/t) and nickel (219 g/t). Three acid media were used: ferric sulphate in sulfuric acid, ferric sulphate in