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 …
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 ...
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 ...
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 …
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.
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.
Flotation kinetic behavior of two deposits including an elevated-pyritic (Cu/S=0.21) complex copper sulfide ore and a high-grade carbonaceous sedimentary …
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 ...
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
What is Molybdenite? Molybdenite is a rare mineral composed of molybdenum and sulfur, with a chemical composition of MoS 2.It occurs in igneous and metamorphic rocks as gray hexagonal crystals and foliated masses with a metallic luster.Molybdenite is the most important ore of molybdenum and often contains minor amounts of rhenium which are …
Molybdenite is the most important mineral resource for molybdenum, and it can be recovered as a byproduct from porphyry copper ores. Froth flotation, which is the most cost-effective way to separate Mo and Cu in industry, has been studied extensively.
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. …
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 …
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 …
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 evaluated systematically.
One of the challenges for the flotation of copper-molybdenum ores is the presence of copper sulphide minerals in molybdenum concentrate. Small grains of …
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 …
The copper ore in Chilean copper porphyry deposits is often associated with molybdenum minerals. This copper–molybdenum …
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.
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 ...
Molybdenite is a valuable by-product in copper flotation. Driven by economic considerations, the recovery of molybdenite from low-grade porphyry copper ores has …
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 …
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 copper–molybdenum ores using a combined collector emulsion. The object of research was copper–molybdenum ore containing …
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...
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. …
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 …
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 ].
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.