Cobalt and Nickel Production. B. Mishra, in Encyclopedia of Materials: Science and Technology, 2001 1 Sources and Commercial Methods. The extractable sulfide minerals are pentlandite ((Ni,Fe) 9 S 8) which contains a small amount of cobalt, and the most abundant pyrrhotite ((Fe n−1 S n) or (Ni,Fe) 7 S 8).Chalcopyrite is another major mineral for nickel …Web
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Sulfide globules (Fig. 2 a and b) are localized above the disseminated ores and/or below the lowermost massive ores in the fine-grained contact facies. Thin tabular or sheet-like zones of massive mineralization are normally the basal shear zones or situated in the footwall rocks.Web
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The Cu-Au deposit of Bor (Serbia) represents a continuum of mineralization styles, from porphyry-style ore occurring in quartz-magnetite-chalcopyrite veins and chalcopyrite disseminations to high-sulfidation epithermal Cu-Au ores in pyrite-chalcopyrite and anhydrite-sulfide veins. Decisive for the great economic importance of Bor is the …Web
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The effect of enrichment with Nd in sulfides from magmatic Cu-Ni-PGE complexes and sulfide ores from hydrothermal Pb-Zn, Au-Mo, and gold deposits was found and characterized. This paper concerns ...Web
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Sulfide minerals are compounds in which sulfur is combined as an anion with a metal (or semi-metal) cation or cations. The definition …Web
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The paper presents an overview of bio-oxidation of sulphidic refractory gold ores prior to gold cyanidation. This review discusses several factors, more importantly, oxygen requirements and oxygen ...Web
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case sulfides and oxides in contact with them achieve a similar concentration of non-ferrous metals, wt.%: up to 0.7 Co, 1.5–21.8 Cu, and 1.1–56.6 Zn. Heating a mixture of …Web
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Sulfide ores are crushed and ground in order to liberate nickel minerals by selective flotation, in place of, or in conjunction with magnetic separators. After that, nickel concentrate (containing 6–20% Ni) can be collected. The enriched concentrate contains fuel composition in the form of iron sulfide, which can reduce the energy consumption ...Web
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The purpose of this study is to show the patterns of distribution of disseminated sulfide in layered rocks based on the numerous geochemical and mineralogical data obtained for eight boreholes of the Norilsk intrusion (southern part of the Norilsk 1 deposit). There is a common trend of sulfide liquid fractionation in the Main Ore …Web
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Sulfide Ore. The most common sulfide ore minerals are pyrite, pyrrhotite, chalcopyrite, sphalerite, and galena, whereas the most common oxide ore minerals are hematite, …Web
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Sulfide minerals generally refer to metallic minerals containing sulfur, such as pyrite, chalcopyrite, sphalerite, etc. Sulfide ore is a collection of various sulfide minerals with important industrial value. When the sulfide ores contact with air, an oxidation reaction will occur, and heat will be released.Web
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Oxygen-containing heterocyclic compounds are used as frothers in the flotation of sulfide and other ores. The T-80 reagent representing dimethyldioxane distillation residue and containing monohydric alcohols of the dioxane and pyran series is widely used [].At the same time, there are no indications that oxygen atom as a part of …Web
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Bioleaching of Zinc Sulfide Ores and Concentrates. The dissolution rate of zinc from zinc sulfide minerals using mixed cultures of A. ferrooxidans and A. thiooxidans is reported to be higher than with A. ferrooxidans or A. thiooxidans alone [1]. While addition of an appropriate concentration of ferric iron is beneficial to zinc dissolution ...Web
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A smelting workaround. The traditional route for extracting copper from sulfide ores is smelting. Yet there is a growing case for leaching sulfides from lower grade ore bodies and especially for those …Web
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Copper is extracted from primary sulfide ores through a flotation process and low-grade ores are traditionally discarded because they are too costly to process. Currently, an alternative hydrometallurgical heap leach process is employed for low grade oxide and secondary sulfide ores. ... BASF Media Contact. Laraine Kruger. Phone: +27 11 203 ...Web
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The baric ore trap (P-trap) in the formation of sulfide ores in the section (a) and in the PT diagram (b). 1 – enclosing rocks of the lava strata of the Lower Triassic; 2 – rocks of a fully differentiated intrusive (a ... The "rusty" surface of the lower contacts, so characteristic of the titanomagnetite layers of the Bushveld, and the ...Web
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In this review, the fundamental process of bioleaching from low-grade metal sulfide ores are discussed with emphasis on mechanism, types, pathways, techniques, …Web
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Liquid immiscibility: sulfide ores containing copper, nickel or platinum may form from this process. As a magma changes, parts of it may separate from the main body of magma. ... which favours aqueous fluids in contact with the host mineral during diagenesis. solubility of the host mineral within nascent hydrothermal solutions in the source ...Web
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The conventional smelting and refining of Ni sulfide concentrates is an effective strategy for extracting Ni from sulfide ores. However, during the smelting process, sulfur is oxidized to sulfur dioxide (SO 2), which poses a significant environmental hazard.The present work investigates the feasibility of an alternative process to recover …Web
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Unwanted leaching of metal sulfide-containing ores by leaching microorganisms generates acid mine/rock drainage (ARD/AMD). ... (II) ions, is well accepted to explain bioleaching. In addition, two bioleaching modes exist: "contact" and "non-contact" leaching (Sand et al. 2001; Rawlings 2002). Non-contact leaching is basically …Web
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The authors describe the opportunities of low-grade sulfide ores and mine waste processing with heap and bacterial leaching methods. By the example of gold and silver ores, we analyzed specific issues and processing technologies for heap leaching intensification in severe climatic conditions. The paper presents perspectives for heap …Web
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The contact process for sulfuric acid dates from 1831, when a Briton patented a method for converting sulfur dioxide to sulfur trioxide by passing the gas through a heated tube filled with finely divided platinum. ... Copper, lead, zinc, and other sulfide ores may be processed by roasting or smelting. Roasting or sintering of sulfide ore is ...Web
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1. Introduction. The practice of froth flotation, a physico-chemical process based on exploiting differences in surface wettability to effect a separation between valuable and gangue minerals [1], presents the most economical and efficient enrichment method for ores in the mining sector.However, the ever increasing demand for metals and the …Web
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The massive sulfide ores tend to occur along the lower contact of the intrusion between the intrusive and host rocks. Fig. 1. Schematic geological map of the Noril'sk ore region showing the position of the Noril'sk 1 deposit (Sluzhenikin et al., Reference Sluzhenikin, Krivolutskaya, Rad'ko, Malitch, Distler, Fedorenko and Simonov 2014 ).Web
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The Noril'sk massive ores commonly contain 5-12 vol% of magmatic magnetite whereas magnetite is absent in the Jinchuan massive ores, which suggests that the sulfide liquid at Noril'sk had a ...Web
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Most are quite rare. The table seen here lists the more important species. Pyrite (iron sulfide) is most common. Other relatively common sulfides include …Web
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In this article, a methodology is described for the wavelength-dispersive X-ray florescence analysis of sulfide ores by fusion techniques. A boron nitride crucible is …Web
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Pyrrhotite is an iron sulfide mineral with variable composition and its formula is usually given as Fe(1-x) S, where "x" represents vacancies in the Fe sites. For example, if x = 0.1, then the formula for pyrrhotite is Fe 9 S 10. The greater the Fe vacancies, the more unstable is the pyrrhotite, and the greater the tendency to oxidation.Web
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a diverse range of products (i.e. mixed sulfide precipitate, mixed hydroxide precipitate, metal powder, cathode) whilst saprolitic ores are generally processed via pyrometallurgy to CONTACT Miao Chen [email protected] CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, AustraliaWeb
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Flotation Reagents. BASF is committed to providing sustainable solutions to the mining industry. Our technology and diverse range of chemistries supports creative and innovative applications for flotation, whilst delivering optimum performance for phosphates, sulfide ores, and various industrial minerals. Our flotation product portfolio offers ...Web
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Sulphide ores are a major source of Cu, Ni and precious metals. A basic principle of the extraction processes is to blow air into the molten sulphide in order to oxidise (1) S, which forms a gas and (2) Fe, which forms predominantly FeO and then partitions to a slag phase which covers the matte. A key element in the recovery of the metals is ...Web
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Sulphidisation, an electrochemical process for conversion of a non-sulphide, oxide or oxidised sulphide, to a sulphide surface that facilitates efficient adsorption of thiol collectors to impart hydrophobicity, offers a way to improve the enrichment of oxide and oxidised sulphide ores by flotation.Although it has shown great potential, it has equally …Web
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Abstract. Platinum-group elements (PGE) are mined predominantly from deposits that have formed by the segregation of molten iron-nickel-copper sulfides from silicate magmas. The absolute concentrations of PGE in sulfides from different deposits vary over a range of five orders of magnitude, whereas those of other chalcophile elements vary by ...Web
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Surface oxidation of the sulfide minerals negatively affects the flotation performance, i.e., the selectivity and even the recoveries at heavy oxidation conditions. Oxidation may take place during the formation of the ore, during mining and stockpiling, and during the flotation process. Stockpiling of large amounts of ore is a common practice in …Web
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Sulfide ores, which are generally mined from underground and often found in conjunction with copper-bearing ores, contain copper–iron sulfides in association with nickel–iron …Web
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Pd-rich pentlandite (PdPn) along with ore-forming pentlandite (Pn) occurs in the cubanite and chalcopyrite massive sulfide ores in the EM-7 well of the Southern-2 ore body of the Talnakh deposit. PdPn forms groups of small grains and comprises marginal areas in large crystals of Pn. The palladium content in PdPn reaches up to 11.26 wt.%. …Web
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