· Ratio, 5.9 tons to 1. By flotation at 30-mesh—the same ore—the concentrate as-sayed 25.03 per cent, of Cu, recovering 73 per cent, at a ratio of 8.4 into 1. The Wilfley concentrate added to this 7.31 per cent, more, assaying 6.32 per cent, of Cu, ratio 21.19 to 1, a total recovery of 80.31 per cent.
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300 Hong-tao ZHANG, et al/Trans. Nonferrous Met. Soc. China 34(2024) 298−308 chalcopyrite and molybdenite ore blocks were cleaned using an ultrasonic cleaner for 5min. Then, they were pretreated via O 3 oxidation for different durations of time. Finally, the
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· The result shows that the grade of molybdenum ore concentrate is 45.31%, the recovery is 65.98% and the rich ore ratio reaches 20.59% by the regrinding and scrubbing seven cleaning, the regrinding of concentrations from middling of molybdenum-sulfur separation. The regularly-concentrated material from the apparatus was as the
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· Low flotation efficiency has always been a problem in the separation of low-grade molybdenum ores because of the finely disseminated nature and crystal anisotropy of molybdenite. In this study, a novel kerosene–coal tar collector (KCTC) was prepared and used to explore the feasibility of improving the recovery of fine
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A mineral sample weighing 2.0 g, consisting of single minerals or artificially mixed ores of chalcopyrite and molybdenite in a weight ratio of 1:1, was dispersed in 40.0 mL of deionized water using an XFGC II flotation machine.
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· Modern trends in technological improvement for producing high-quality rhenium-containing molybdenum concentrates are aimed at developing environmentally friendly solutions com-pared to traditional
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· One gram of molybdenite or chalcopyrite (D 80 10 µm) was conditioned in an IMN flotation machine at pH 9.3 with 300 mL of 10 −2 M NaCl aqueous solutions containing various amounts of OMs (initial concentration, C
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· Fig. 2 (a) illustrates the relationship between the flotation results of chalcopyrite and molybdenite and pH value of pulp at collector dosage of 1×10 −5 mol·L −1.As depicted in Fig. 2 (a), pH value exerts negligible impact on the flotation performance of chalcopyrite, while it significantly affects the recovery of molybdenite.
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· Typically, molybdenite is mainly concentrated in Cu-Mo porphyry ores, where molybdenite and chalcopyrite (CuFeS 2) coexist closely. To efficiently separate molybdenite and chalcopyrite, a two-stage flowsheet is commonly employed for flotation separation ( Yang et al., 2020 , Yuan et al., 2019 ).
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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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· China has abundant Mo resources. Molybdenum ores contain a low content of Mo, generally no more than 0.5%, and Mo is often associated with many valuable elements, such as Pb, Cd, As, Cu, iron (Fe
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: Gaosong Yi, Eloy Macha, Jeff Van Dyke, Rafael Ed Macha, Tim McKay, Michael L. Free · Molybdenum Ore Processing by Flotation. This molybdenum flotation circuit, based on 250-500 tons per 24 hours is
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:Shuhua Du, Zhenfu LuoPublish Year:2013 · An effective flotation approach is proposed for improving the recovery of molybdenite fines from a finely-disseminated molybdenum ore. To maximize the
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Flotation separation of chalcopyrite from molybdenite was studied using seaweed glue (SEG) as a depressant. Flotation process and mechanism were examined by response surface methodology, flotation tests, adsorption tests, zeta potential measurements and fourier transform infrared (FT-IR) spectra. Response surface methodology with a
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· In this study, two auxiliary collectors (methyl naphthalene and naphthalene) of molybdenite and the traditional collector (kerosene) were mixed for molybdenite flotation, respectively. According to the selection and analysis of the auxiliary collector, it was found that the surface energy (γC= 44.50 mJ/m2) of the polycyclic
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· The China Molybdenum deposit contains several billion tonnes of ore averaging 0.12% molybdenum and 0.015% copper. The bench-scale flotation tests were conducted in a series of flotation machines (XFD-1.5L, XFD-1.0L XFD-0.75L, XFD-0.5L, XFGC II
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· In this study, two auxiliary collectors (methyl naphthalene and naphthalene) of molybdenite and the traditional collector (kerosene) were mixed for molybdenite flotation, respectively. According to the
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· Ore Laboratory Testwork Comminution Testing Mineral Liberation Gravity Concentration Testing Flotation Testing Hydrometallurgy Tests Commissioning & Training Processing Plant Design Pilot Plant Design Process
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· The flotation experiments on a laboratory scale were done on XFG-type flotation device (Jilin Exploration Machinery Plant, China) equipped with a 3.0 L flotation cell. The rotor speed was 1500 rpm. For each flotation test, 1000 g of ore was mixed with ∼2.0 L of tap water in a flotation cell and stirred for 3 min to form a homogeneous slurry
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2.2 Method Flotation machine used in this study was Denver sub-A flotator of lab-scale. Figure 2 shows a flow sheet of froth flotation for the recovery of molybdenite. The sample was crushed and ground, and the minus 150 mesh fraction was used for flotation tests
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:Publish Year:2021Zhengchang [email protected]Molybdenum ore beneficiation often uses flotation to recover valuable molybdenite. The molybdenum flotation process has a large enrichment factor and a fast speed.
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· As reported by Alvarez et al. [ 151 ], the recovery of molybdenite fines (<10 μm) increased from 50% to 85% with the addition of 10 ppm of PEO and 50 ppm of diesel at pH 9. Even in seawater, a 20% increase in fine molybdenite (<10 μm) recovery was achieved by using the same dosage of PEO and diesel.
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· This paper reviews the surface chemistry and floatability of molybdenite, usually by-product in Cu/Mo sulfide ores. Oil collectors are used to improve molybdenite flotation and the comparison with thiol collectors is discussed. Some inorganic ions are strong molybdenite depressants, such as, calcium ions and lime.
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· MoS 2 flotation tests were performed in a mechanical agitation XFG ІІ-type flotation machine made by Wuhan Exploration Machinery Factory (Wuhan, China). First, 0.25 g MoS 2 (38–75 μm) and 25 mL conditioned solution were added into the 40 mL flotation cell, followed by maintaining pulp pH at a desired value during the first 6 min
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The paper presents the results of laboratory studies on the flotation of copper-molybdenum ore from the Kazakh-stani deposit using a combined reagent. A combination of butyl xanthate, a noninogenic collecting agent with a thioamide group – TC-100 thionocarbamate and higher aerofloat (Reafloat series) was used as a combined
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· The flotation results of actual molybdenum ores further confirmed that KCTC was beneficial to flotation recovery and the selectivity of molybdenite. This indicated that KCTC is a potential collector for the
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· Luo and others published A case study of flotation of chalcopyrite-molybdenite ore using a mixture of pyrogallic acid and (Jilin Exploration Machinery Plant, China) equipped with a 3.0 L
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· Mechanical flotation machines, also known as conventional flotation machines, are the most common type used in industry. They consist of a series of cells arranged in a row, with each cell containing an impeller-driven rotor that rotates to create turbulence and disperse air bubbles into the slurry.
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· 1.2. Hydrodynamic effects (a)In flotation, the rate at which particles are removed from the slurry by air bubbles can be represented by (Newell and Grano, 2007): (1) d N p d t = k N p = − Z pb × E coll in which N p is the number of particles in the slurry at time t, k the flotation rate constant, Z pb the collision frequency, and E coll the collection
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:Publish Year:2021Research of Molybdenite Flotation · Molybdenite is naturally floatable and can be separated from copper sulfide mineral using froth flotation. Properties of molybdenite such as mineralogy, microstructure, surface wettability, zeta
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