Semantic Scholar extracted view of "Copper–molybdenum ores flotation in sea water: Floatability and frothability" by O. Ramos et al. Skip to search form Skip to ... Flotation using sea water has been considered as a promising alternative to concentrate molybdenite (MoS2) under alkaline conditions due to scarcity of fresh water and ...
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At the same time, molybdenite is depleted in this metal in compliance with more sialic crust and potassium content in ore-bearing dioritic rocks. Quartz diorites at the highest-Re deposits contain 1–2 wt % K2O. ... Grabezhev, A.I., Rhenium in Ores of Porphyry Copper Deposits in the Urals, Dokl. Earth Sci., 2007, vol. 413, no. 2, pp. …
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Because of large differences between the surface properties of molybdenite and other sulfides, molybdenite can be recovered from Cu–Mo ores as a by-product with copper at levels as low as 0.01% Mo. Approximately half of the world's molybdenum production comes from porphyry Cu–Mo ores (Bulatovic, 2007, Guang-yi et al., 2012).
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However, it needs recovery molybdenite from the copper circuit (see Fig. 1b), and the floatability of molybdenite has to be impaired by the lime used in the flotation separation of Cu/Fe sulfide minerals. ... The test material are porphyry copper ores from the Dexing copper mine of Jiangxi Province in China, and the copper bearing minerals …
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Molybdenite in porphyry ores is a byproduct of copper concentrate, therefore it is more reasonable to establish both the grinding size and the flotation scheme for copper minerals. [8] Fig. 19(a) [13] displays the average size by size recovery of molybdenum and copper for 18 months in the Bingham Canyon mine.
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The Sarcheshmeh copper mine is a significant copper and molybdenum producer. Sampling of the Sarcheshmeh flotation circuit (in a six-month period) showed that a large share of waste of molybdenite took place in rougher cells. Since the rougher cells tailing is transferred to tailing thickener, the main focus of this paper was on this section. …
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These clays are common in porphyry copper-molybdenite ores. Therefore, the recovery of molybdenite would lower due to the adhesion of these clays on the hydrophobic face of molybdenite. Two ways can prove this: (1) desliming the milled ore to remove the clays prior to the flotation step and (2) using clays dispersants to prevent the …
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Porphyry copper deposits (PCDs) are some of the most important sources of copper (Cu) and molybdenum (Mo). Typically, the separation and recovery of chalcopyrite (CuFeS 2) and molybdenite (MoS 2 ...
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Investigations have been conducted to characterize the surface chemical and flotation properties of molybdenite in aqueous environments typical of those that exist in the copper circuits of plants which process porphyry copper ores. These investigations have revealed that molybdenite and quartz particles are negatively charged at the pH ...
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For a copper-molybdenum ore with mainly primary copper sulphide or secondary copper sulphide, most of the copper sulphide minerals can be recovered by …
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Molybdenite-bearing copper sulphide ores are typically beneficiated by froth flotation techniques in two stages. The first stage, commonly known as the copper circuit, produces a bulk copper ...
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Typically, rougher molybdenite flotation and recovery from bulk copper/molybdenum concentrates involves the use of alkalisulfides, Nokes reagents, cyanides, oxidants, and/or thermal treatment to depress copper sulfide minerals. The bulk copper/molybdenum feed generally varies from 0.2% Mo to 1.0% Mo, and with …
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To understand this metal separation and the geochemical process of molybdenite mineralization, we investigated fluid inclusions by microthermometry, Raman spectroscopy, and laser ablation inductively couple plasma mass spectrometry (LA-ICP-MS) microanalysis in low- and high-grade quartz veins of both mineralization stages.
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DOI: 10.1016/0301-7516(84)90026-7 Corpus ID: 94961035; Factors affecting the flotation recovery of molybdenite from porphyry copper ores @article{Raghavan1984FactorsAT, title={Factors affecting the flotation recovery of molybdenite from porphyry copper ores}, author={Srinivasa R. Raghavan and L. L. Hsu}, journal={International Journal of Mineral …
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Flotation kinetic behavior of two deposits including an elevated-pyritic (Cu/S=0.21) complex copper sulfide ore and a high-grade carbonaceous sedimentary …
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Because of large differences between the surface properties of molybdenite and other sulfides, molybdenite can be recovered from Cu-Mo ores as a by-product with copper at levels as low as 0.01% Mo ...
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2.1.4. Molybdenum ores. Molybdenite is the principal ore mineral of molybdenum. It exists as an accessory mineral in granites, pegmatites, as well as associated with porphyry copper deposits (Klein and Hurlbut, 1993).In granite or pegmatites rocks, molybdenite is usually recovered as the primary product.
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Particle size is a very important factor affecting flotation properties of molybdenite. In porphyry copper–molybdenite ores the flotation conditions (grinding, reagents, bubble size, etc.) all are optimized with respect to Cu and not Mo. Fig. 2 shows that the optimum flotation particle size for molybdenite is around 20 μm, and the size …
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Molybdenite recovery was consistently higher at reduced flotation feed solids percent. Furthermore, the recovery of molybdenite was significantly lower from flotation feeds with high limestone skarn ore content. The major factors affecting the flotation recovery of molybdenite from both porphyry and skarn copper ores are discussed.
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In flotation of porphyry molybdenite ores or copper-molybdenite ores using oil collector, a molybdenite (MoS 2) concentrate has mainly been separated by combination of sodium silicate (Na 2 SiO 3 ...
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Molybdenum, in the form of molybdenite, is a common byproduct of many copper mining and concentrating operations. While the recovery of most copper sulfide minerals is principally liberation controlled, the recovery of molybdenite is much more complex, with fully liberated particles commonly lost to tailings.A geometallurgical …
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Copper-molybdenum porphyry ores often contain copper sulfide minerals, molybdenite, pyrite, iron oxides, and gangue minerals. Due to the differences in the flotation properties of sulfide minerals and associated gangues, flotation is the most common method for processing copper-molybdenum sulfide ores.
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Molybdenite flotation in sea water was depressed in alkaline solutions when pH was higher than 9.0–9.5. At the same time, Cu recovery was only slightly reduced and was not significantly affected by pH. ... In the case of copper ores (mostly hydrophilic particles) these phenomena are different and the effect of sea water (at alkaline pH …
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The object of research was copper–molybdenum ore containing 0.43% copper and 0.0089% molybdenum. Copper minerals are represented by chalcopyrite 1.2% and chalcocite 0.015%, while covellite …
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Copper-Molybdenum ores Molybdenite (MoS 2) is the predominant economic molybdenum mineral. While naturally very hydrophobic and can effectively be floated with just frother, addition of a hydrocarbon oil extender enhances its recovery. Making very pure moly concentrate grades
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1. Introduction. Copper minerals and molybdenum minerals have closely paragenic relationships, and approximately half of molybdenum production comes from Cu-Mo sulfide ores as a by-product (Hirajima et al., 2014).Porphyry copper deposits are one of the primary resources for the extraction of copper and molybdenum, in which …
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One of the challenges for the flotation of copper-molybdenum ores is the presence of copper sulphide minerals in molybdenum concentrate. Small grains of chalcopyrite (smaller than 50 μm), as well as pyrite, are the major impurities in the molybdenum concentrate. ... the type and behavior of molybdenite and copper …
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Porphyry copper ores are distinguished by sulfide fractions that include residues of molybdenite and are typically separated as a flotation concentrate containing up to 90% MoS 2. Due to its crystal structure, Molybdenite is concentrated by selectively enriching low-grade ores through flotation [ 2 ].
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The present paper deals with the effects of sulphate ions on copper mineral flotation in two copper ores: one where chalcopyrite is associated with molybdenite and the other with sphalerite. Complementary studies of single mineral flotation of chalcopyrite and molybdenite, their surface analyses and particle-bubble interaction are also ...
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of porphyry copper- molybdenite ores. These findings were obtained with xanthate dithiophosphate collectors (Srdjan 2007). Experimental test work carried out at a number of plant laboratories has mentioned two major factors that dictate the amount of lime used. 1. Flotation of copper at different pH is associated with the type of frother used.
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While in the rougher flotation step, a selective collector thionocarbamate is used for preconcentration of copper and molybdenum from porphyry copper ores, which …
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