occurrence of pyrite in the flotation

occurrence of pyrite in the flotation

Depression of pyrite in the flotation of high pyrite low ...

2010-1-1  The pyrite flotation rate constant decreased significantly when A. ferrooxidans interacted with the flotation pulp for 20 min. 7. Validation experiments with different frothing times showed that in the presence of A. ferrooxidans , 74% of sphalerite was floated and the Zn grade surged to 26.21%, while the recovery of pyrite was only 15.82%.

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The depression of pyrite in selective flotation by ...

2016-10-1  1. Introduction. Pyrite (FeS 2, iron disulfide), is the most abundant sulfide mineral and commonly associated with valuable minerals such as sphalerite, chalcopyrite, galena, gold as well as coal (Wang and Forssberg, 1991, Wang, 1995, Dimitrijevic et al., 1996, Jiang et al., 1998).Pyrite has very low economic significance and is usually removed from the valuable components by flotation and ...

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(PDF) Pyrite Flotation: A Review - researchgate

Pyrite Flotation: A Review. N. E. Altun and T. Güler. Muğla University, Mining Engineering Depar tment 48000 Muğla, Turkey. Ü. Akdemir. Cumhuriyet University, Mining Engineering Dep artment ...

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A review on electrochemical behavior of pyrite in the ...

2017-3-25  The results of these electrochemical studies on pyrite flotation systems clearly show that the flotation recovery in the collector-less conditions is a function of the mineral/solution interface electrochemical potential .Cyclic voltammetry studies of freshly created pyrite surfaces indicate that the potentials at which, pyrite begins to float correspond to the potentials at which, the freshly ...

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of Pyrite in Seawater Flotation by Guar Gum

as the sole depressant for pyrite, primarily when flotation is carried out in freshwater [11,12]. Interestingly, the use of seawater is a strategy that is being frequently adopted in sectors that ...

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A Brief Review of Auriferous Sulphide Flotation ...

2020-8-21  Pyrite, the most abundant sulphide mineral in the earth crust is mostly found in close association with arsenopyrite in most auriferous complex ore bodies. Previous studies on occurrence of gold in these sulphides has shown the preferential preconcentration of gold in arsenopyrite compared with pyrite.

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The role of sodium sulfide in the flotation of pyrite ...

2018-4-1  In copper-gold flotation plants, pyrite which is depressed in copper flotation is often floated subsequently with the addition of sodium sulfide (Na 2 S) to recover the associated gold. For the first time, this study investigated the role of Na 2 S responsible for the flotation of pyrite depressed in chalcopyrite flotation through flotation tests and Cyro-XPS (X-ray photoelectron spectroscopy ...

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(PDF) A Brief Review of Auriferous Sulphide Flotation ...

flotation of auriferous pyrite and arsenopyrite by using tertiar y dodecyl mercaptan as collector in weak alkaline pulp ” , Minerals Engineering , Vol.

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Recent Trends in Flotation of Fine Particles Request PDF

The effect of grinding media on the flotation of pyrite activated by Cu(2+) or Pb(2+) is through the change of pulp potential and iron oxidation species emanating from the media.

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Pyrite - Occurrence, Properties, and Distribution

Pyrite has a pale brass yellow color with metallic luster, greenish black streak and opaque characteristics. It is non-fluorescent and magnetic after heating. Its fractures are characterized by smooth curved surfaces. The average density of pyrite is 5.01 g/cm 3, and its hardness is 6.5.

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Research on mineralogy and flotation for coal-series ...

The mineralogy demonstrated that pyrite was the main occurrence of iron in the coal-series kaolin. The influence of grinding time and pH on the flotation was researched so as to determine the optimal flotation conditions. The results of froth flotation showed that the mass fraction of pyrite in kaolin concentrate was 0.11% at 1.12% pyrite in ...

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Shut-In Creek Pyrite Occurrence (MRDS #10026370) FE_P, AU

sample was quartered and 150 - gm. splits (-20 mesh) from each quarter were analyzed and found to contain less than 0.005 oz./ton gold. a 250 - gm sample was split from one of the quarters, ground to -100 mesh, and the pyrite removed by flotation and analyzed to show a gold content of less than 0.005 oz./ton.analysis by u.s. bureau mines.

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Wetting of Sphalerite, Chalcopyrite and Pyrite in ...

2021-3-4  The parameters of flotation concentration are associated with the characteristics of mineral wetting and the conditions for the occurrence of an elementary flotation event when using collectors and other flotation reagents [1, 2, 13–18]. This paper presents the results of a study into physicochemical characteristics of wetting of sphalerite ...

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Pyrite Recovery Mechanisms in Coal Flotation

2018-7-27  Pyrite Recovery Mechanisms in Coal Flotation. In many coal flotation operations, a significant amount of apparently liberated pyrite is seen to report to the froth, thus raising the sulfur content of the clean product and reducing its economic value. Prevention of this unwanted recovery of pyrite is therefore desirable.

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Flotation of sphalerite and pyrite in the presence of ...

2016-11-28  8 min of flotation of 88% in the absence and 73% in the presence of 10 mol dm. y3 3 sodium sulfite. The effect of sodium sulfite on pyrite flotation is more pronounced than on sphalerite flotation with flotation recoveries being reduced by half at a sodium sulfite concentration of 2=10 y4 mol dm 3. However, at higher sodium sulfite concentrations,

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The flotation of pyrite and chalcopyrite in the presence ...

The flotation tests of single mineral show that LSC can depress the flotation of pyrite in a certain pH range, but it has little effect on chalcopyrite flotation. Flotation separation of a mixture ...

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Flotation of sphalerite and pyrite in the presence of ...

Flotation tests showed that chalcopyrite flotation rate, recovery and grade, as well as the pulp oxidation potential, decreased with increasing pyrite content whilst pyrite recovery increased.

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Flotation data for the design of process plants Part 2 ...

2021-6-24  Mineral Occurrence, % Pyrite 40 70 Sphalerite 15 25 Galena 6 12 Arsenopyrite 1 3 Chalcopyrite 0.8 2 Tetrahedrite 0.1 Non-sulphides 5 25 Dunne et al. Flotation data for the design of process plants: Part 2 206 Mineral Processing and Extractive

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Study on Preparation and Mechanism of Pyrite (FeS2 ...

according to the typomorphic characteristics of pyrite, seek more effective flotation reagents and pyrite inhibitor. Meanwhile, to ameliorate preparation equipment and strengthen its management and maintenance. Conclusions Coal resource is an indispensable basic resource of China, and it is an important guarantee for the

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ROLE OF STARCH AND METABISUPHITE ON PURE PYRITE

2011-8-19  Role of starch and metabisulphite on pure pyrite and pyritic copper ore flotation 43 occurred with 1.7 mg/ dm3, while 21% depression occurred with the same dosages of starch at pH 6.5 where pyrite flotation is expected to be weak at pH 10.

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NICKEL AND COBALT ORES: FLOTATION

2016-6-7  Developments in Flotation Flotation of Nickel Sul\de Minerals Collectorless Wotation It is known that chalcopyrite and pyrrhotite can be Soated without collectors at electrode potentials of #400 mV and #50 mV respectively, and pyrite does not Soat even at #700 mV. The underlying mechanism causing hy-drophobicity, although obscure, is attributed ...

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Designing the Optimal Flotation Circuit – The Prominent ...

2016-1-14  grinding and flotation was proposed for the copper-gold sulfide ore. Gold occurrence was characterised using gravity concentration, amalgamation, cyanidation and flotation. Four composite samples were prepared according to the then known mineralisation types of chalcocite-bornite, chalc-opyrite-bornite, chalcopyrite-pyrite and eastern gold-only ...

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The role of sodium sulfide in the flotation of pyrite

2018-4-1  Abstract In copper-gold flotation plants, pyrite which is depressed in copper flotation is often floated subsequently with the addition of sodium sulfide (Na2S) to recover the associated gold. For the first time, this study investigated the role of Na2S ...

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Gold in the Jinya Carlin-type Deposit: Characterization ...

2013-12-24  Pyrite is the most common sulfide mineral and most important gold carrier in the Carlin-type deposits. The content of pyrite in the ore is about 5% on average. Morphologically, pyrite commonly occurs as coarse-grained, blastic, fine-grained and microcrystalline varieties (Figure 11). Coarse-grained pyrite

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Effect of Desliming on Flotation Response of Kansanshi ...

2019-8-7  They suggested that the optimal size range for pyrite flotation in environmental desulphurization is between 35 microns (µm) and 120 µm. This is consistent with earlier observations on pyrite flotation reported by the authors ][6 who defined the size range for maximum pyrite recovery to lie between 50 µm and 150 µm.

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Pyrite Flotation Separation and Encapsulation: A ...

2021-1-28  Pyrite flotation separation and encapsulation in tailings dams is proposed as a viable way to chemically stabilize tailings. Characterization of potential acid mine generation in tailings led to an innovative process in which acid-generating pyrite is separated by flotation from the coarse tailings and incorporated into the slime zone. This creates pyrite-free neutral tailings acceptable for ...

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Please cite this article as: Guo, Bao, Peng, Yongjun, The ...

2019-10-11  found to activate mineral flotation as well (Prestidge et al., 1997; Seke and Pistorius, 2006). A distinctive aspect of pyrite is the occurrence of variable surface compositions subjecting to oxidizing or reducing aqueous solutions (Murphy and Strongin, 2009). Pyrite surfaces after

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Depression of pyrite in porphyry copper flotation

2014-12-18  Pyrite reports to the Cu concentrate even at high pH 0 20 40 60 80 100 2 4 6 8 10 12 pH Flotation recovery (%) PPyy Cp Case Study Pyrite should not float at high pH (Gaudin, 1957): Maximum pyrite recovery in the intermediate size ranges true flotation Xanthateadsorp. density [ ] [ ]− − ∝ OH X log

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A study of the interfacial chemistry of pyrite and coal in ...

1993-1-1  @article{osti_10158220, title = {A study of the interfacial chemistry of pyrite and coal in fine coal cleaning using flotation}, author = {Jiang, Chengliang}, abstractNote = {Surface oxidation, surface charge, and flotation properties have been systematically studied for coal, coal-pyrite and ore-pyrite. Electrochemical studies show that coal-pyrite exhibits much higher and more complex ...

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The E Pyrite from Serpentine by Flotation

2019-10-14  minerals Article The E ect of Surface Charge on the Separation of Pyrite from Serpentine by Flotation Tao Long 1,y, Xiaotao Huang 2,y and Wei Xiao 1,* 1 School of Resources Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; [email protected] 2 The institute for advanced studies, Wuhan University, Wuhan 430072, China; [email protected]

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CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

2015-10-19  Above pH 11, the surface of pyrite is of ferric hydroxide (Fe(OH) 3), a hydrophilic compound. Calcium ion contributed by lime in pH adjustment also adds to pyrite depression. Flotation is affected about one pH unit lower if CaO is used for raising pH compared with KOH or K 2 CO 3 The pzc for pyrite is at pH = 6.9.

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Role of dixanthogen on pyrite flotation: solubility ...

2002-5-1  The xanthate adsorption mechanism on pyrite was investigated with an emphasis on solubility studies. Additionally, adsorption studies, Eh and infrared spectrophotometer measurements were performed. Pyrite floats at pH levels between 3 and 6 using ethyl and amyl xanthafes with a maximum at pH 4. The solubility of pyrite in the absence and presence of xanthate was investigated in detail with ...

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Gold-Pyrite ores - Danafloat

Natural pH is recommended for gold flotation. Alternatively using soda ash for pH adjustment can reduce gold depression. Where gold is associated with pyrite in base metal ores where iron sulphides are depressed and report to the tailings, a separate tailings pyrite flotation concentrate should be considered.

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Pyrite Mineral Properties, Uses, Occurrence more...

Occurrence of Pyrite . Formed under a wide variety of conditions. In hydrothermal veins as very large bodies, as magmatic segregations, as an accessory mineral in igneous rocks, in pegmatites; in contact metamorphic deposits, also in metamorphic rocks; as diagenetic replacements in sedimentary rocks.

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Preconcentration of Primary Uranium Ores by Flotation

2016-8-11  stained grains of pyrite, quartz, and pyrite-quartz intergrowth. At least 90 pct of the uraninite was still attached to other minerals in a 100 by 200-mesh size fraction. The uraninite crusts were as small as 10 to 20 p diam, and 5 to 10 p thick. The Flotation Process Petrographic examinations of

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Mineral occurrence for Dachang gold deposit and its impact ...

It is not conducive to the flotation of sulfide if the grinding fineness is low or high. It is difficult to completely dissociate the monomer if there is a small amount of pyrite and arsenopyrite in the ore.

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Study of Flotation Parameters for Copper Recovery from ...

2020-4-1  grained pyrite , performs interstitial 100-500 microns by size [16]. Intergrowth of pyrite, sphalerite, tennantite and other copper sulphides, difference in their activity and size create the considerable problems in implementation of selective flotation,

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Modes of occurrence and removal of toxic elements from ...

2019-6-27  Compared with the products from stepped release flotation, toxic elements (except U and Mo) exhibited the lowest contents in cleaned coals. The occurrence of beryllium (Be), F, V, Cr, cadmium (Cd), barium (Ba), tungsten (W), cesium (Cs), and thallium (Tl) in the flotation products exhibited a similar trend as ash yield.

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Modes of Occurrence of Trace Elements in Samples from

2011-1-14  of occurrence in the final cleaned products and two intermediate materials: the froth flotation feed and the cleaned material from the froth flotation. The unique contribution of this research is that it relates the behavior of elements in a commercial coal cleaning procedure to their modes of occurrence

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