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Molybdenite is a valuable by-product in copper flotation. Driven by economic considerations, the recovery of molybdenite from low-grade porphyry copper ores has become of great interest in the ...
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However, some copper producers encounter difficulties in making acceptable grades of molybdenite concentrates without suffering a loss of 40 to 50 pct Mo in the flotation sequence. Some porphyry copper ores contain significant amounts of rhenium, which is intimately associated with molybdenite.
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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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compatible concentrate processing facility that accommodates copper ores from South America and Europe and exports its blister copper product via the Walvis Bay port. Its by-product, sulphuric acid is ... molybdenite Exploration Resources (31.12.2009)2 total resources: 3.60 Mt @ 2.499% Cu, 0.62 g/t Au total measured & indicated:
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The bioleaching of molybdenite is mediated by ferric iron. The role of acidophilic prokaryotes in this process is to oxidize ferrous iron and sulfur compounds and help maintain high redox potential in favor of molybdenite oxidation as determined by the Fe 3+ /Fe 2+ ratio. Mesophilic bioleaching of molybdenite was tested already in the mid-1950's with undefined …
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The Lobash copper-molybdenum-porphyry mineralization of the Lobash deposit. Northern Karelia, Russia, is located in the apical portion of the 2.715 Ga Lobash granitic intrusion and at its exocontact in an Upper Archean greenstone rock sequence. Molybdenite...
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US3351193A US403335A US40333564A US3351193A US 3351193 A US3351193 A US 3351193A US 403335 A US403335 A US 403335A US 40333564 A US40333564 A US 40333564A US 3351193 A US3351193 A US 3351193A Authority US United States Prior art keywords molybdenite copper moly ore recovery Prior art date Legal status (The …
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Hernlund RW (1961) Extraction of molybdenite from copper flotation product. q Colo Sch Min 56:177–195. CAS Google Scholar Sutulov A (1977) Flotation recovery of molybdenum. Can Metall Q 16:37–47 ... Irannajad M (2014) Investigation of effective parameters for molybdenite recovery from porphyry copper ores in industrial flotation circuit ...
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A copper–molybdenum iso-flotability flotation process has been developed to efficiently improve the recovery of molybdenite from Duobaoshan porphyry Cu–Mo ores. The effects of flotation ...
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There are several flow sheets (listed in Fig. 1 a and b) used in the flotation recovery of copper and molybdenum from their porphyry sulfide ores. Fig. 1 a is a typical flow sheet that consists of two stages (Raghavan and Hsu, 1984, Bulatovic, 2007, Liu et al., 2011).The first stage, commonly known as the copper circuit, produces a bulk copper sulfide–molybdenum …
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1. Introduction. Molybdenite (MoS 2) ores are the major sources of molybdenum and rhenium on a global scale.Molybdenite is frequently associated with copper sulfides and is often a by-product in copper mining. The bioleaching of molybdenite has generally proven to be relatively slow and with low yields (Tributsch and Bennett, 1981, Kelley, 1986, Askari Zamani …
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In conventional flotation systems for copper ores with recoverable molybdenum by-product values, the ore is first crushed and ground in the presence of lime, which is usually added to depress pyrite. ... Separation of molybdenite from copper sulphides US2316743A (en) * : : American Cyanamid Co: Flotation of molybdenite ...
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Technical Challenges in the Flotation of Molybdenite from Porphyry Copper Ores PDF. Normal price $22.00. Member price from $0.00. Add to cart. Fees above are GST inclusive. PD Hours. Approved activity Published: 2009; PDF Size: 0.386 . Unique ID: ...
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Flotation separates the metallic minerals from the gangue this way and - in the case of copper/ molybdenum ores - separates molybdenite from copper sulfide. The resulting MoS 2 concentrate contains between 85 and 92% MoS 2. Further treatment by acid leaching dissolves impurities like copper and lead, if necessary.
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Poor floatability of molybdenite due to calcium and magnesium compound and the increased lime consumption have been claimed as the biggest challenges in Cu-Mo sulphide ores flotation in seawater (Castro, 2012) and new methods are required to reach high recoveries of both copper and molybdenum with an appropriated separation of gangue iron sulphides.
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Currently, both copper oxides and sulphide ores are actually being exploited in Chile, but sulphide ores predominate over the oxides (Bulatovic, 2007, Cochilco, 2012).Chalcopyrite (CuFeS 2) is the main copper sulphide mineral in these ores, which also contain varying amounts of non-valuable and undesired pyrite (FeS 2) (Bulatovic, …
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Generally, the main ore mineral is molybdenite (MoS 2) (Smedley and Kinniburgh, 2017), but due to the low abundance, Mo has not always been considered for extraction in primary ores and was deposited in the residues. Here, it can be enriched in certain areas of the heaps due to separation processes and pose as a secondary deposit with the ...
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A copper–molybdenum iso-flotability flotation process has been developed to efficiently improve the recovery of molybdenite from Duobaoshan porphyry Cu–Mo ores. The effects of flotation approach, type of collector, feed particle size distribution, rougher pH value and reagent dosage on the recovery of molybdenite were … Details
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Cu/Mo Ores. Making pure Moly concentrate grades necessitates removal of essentially all gangue and pyrite during recovery. Make An Enquiry ... Separation and upgrading the molybdenite from the bulk copper-molybdenite …
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Copper-Molybdenum ores. Molybdenite (MoS2) 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. ... Separation and upgrading the molybdenite from the bulk copper-molybdenite concentrate is generally ...
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Emissions generated by the activity within the product supply chain as described in ecoinvent v3.10. The product molybdenite' is a mineral. It is a black lead-silvery grey mineral with very low hardness while it is similar to graphite. It is the direct product from mining and beneficiation and a by-product from copper mine operation and ...
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Extraction and Recovery of Molybdenum and Rhenium from Molybdenite Concentrates by Electrooxidation: Process Demonstration. PB255399. Publication Date: 1976: Personal Author: ... Copper ores Porphyry Brines Sodium chloride Separation ...
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The study of the flotation of copper and molybdenite ores indicates that the recovery of molybdenite and copper flotation is reduced in the coarse, fine and very fine size ranges of these minerals ...
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Molybdenite is the most important source of molybdenum extraction Molybdenite, except for a very small number of single deposits, is widely associated with sulfide minerals, especially copper sulfide minerals. According to statistics, nearly 75% of copper and 50% of molybdenum in the world are produced from copper-molybdenum ores. 12.31 The ...
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The molybdenite forms part of a quartz-molybdenite-pyrite-chalcopyrite assemblage cemented at low-temperatures by pumpellyite and tobermorite. Oscillatory zoning occurs as micro-bands up to 200 μm wide and 200–600 μm long oriented parallel to the basal cleavage, as well as within basal planes of molybdenite sheets.
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Introduction. Molybdenum is a valuable by-product in the processing of porphyry copper deposits, where the molybdenum is present in low quantities in the form of molybdenite (MoS 2).In the conventional processing of copper sulfide ores by froth flotation, most of the molybdenite in the ore floats along with the copper sulfides, and thus a bulk copper …
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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 ...
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Sillitoe et al. propose new robust Re-Os ages on molybdenite for 15 samples from seven deposits with both disseminated ore and ore in veins in the Zambian Copperbelt.The samples have been taken from two main groups of rocks. Firstly, they analyzed molybdenite from several arenite-hosted copper deposits (Chibuluma South, Mufulira; Selley et al. 2005) …
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A copper–molybdenum iso-flotability flotation process has been developed to efficiently improve the recovery of molybdenite from Duobaoshan porphyry Cu–Mo ores.
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Molybdenum is commonly obtained as a byproduct from treatment of porphyry copper ores in which molybdenite is a minor constituent. The conventional separation process is differential flotation, which includes successive re-cleaning steps required to produce high-grade molybdenite concentrate [1], [2], [3].As a result of the many steps involved in the production …
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Nested within the copper ore body are overlapping zones of molybdenum, gold and silver containing 0.06% molybdenum, 0.3 g/tonne gold and 1.5 g/tonne silver. Kennecott was the first company to successfully produce molybdenum concentrate as a byproduct from relatively low grade ores and in 1936 produced approximately 1 million pounds of concentrate.
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The study of the flotation of copper and molybdenite ores indicates that the recovery of molybdenite and copper flotation is reduced in the coarse, fine and very fine size ranges of these minerals.
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In the second stage (molybdenum plant), which includes selective molybdenite flotation, copper sulphide is depressed and molybdenite is floated. One of the challenges for the flotation of copper-molybdenum ores is the presence of copper sulphide minerals in molybdenum concentrate.
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The study of the flotation of copper and molybdenite ores indicates that the recovery of molybdenite and copper flotation is reduced in the coarse, fine and very fine size ranges of these minerals.
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Gold and silver in ores of Kadjaran copper-porphyry deposit (southern Armenia) January 2023; Periodico di Mineralogia 92(1):45-56; ... molybdenite stage increases with the depth, ...
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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 chalcopyrite and molybdenite are the …
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The search for effective reagents for the flotation of non-ferrous metals from mineral raw materials is an actual problem. The article discusses the results of research on improving the technology of processing …
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Porphyry Cu-Mo ores are primary resources for the extraction of copper and molybdenite, which account for 75% copper and 50% molybdenum production in the world (Liu et al., 2012, Bulatovic, 2007, Song et al., 2012). In porphyry Cu-Mo ores, copper and molybdenum mainly exists in the form of chalcopyrite and molybdenite (Laskowski et al., …
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Copper-Molybdenum ores Molybdenite (MoS2) is the predominant economic molybdenum mineral. While naturally very hydrophobic and can effectively be floated with just frother, …
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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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