The depression of pyrite in selective flotation by different …

2022-7-7 · Pyrite is a gangue mineral widely associated with valuable minerals. It is problematic to deal with in differential flotation because it easily reports to flotation concentrates. Pyrite may float due to natural or self-induced hydrophobicity or collector-induced hydrophobicity. Its flotation can also be enhanced by the activation of copper or lead ions emanating from other minerals.

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chemistry of pyrite depression in flotation

The Role of Lime in Xanthate Flotation of Pyrite. The depression of pyrite with lime in xanthate flotation was investigated by means of flotation tests, adsorption studies and electrokinetic potential measurements. The results obtained are summarized as follows: 1. In xanthate flotation of pyrite, lime is more effective than

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Pyrite Flotation

2022-7-30 · Can you list the factors affects the floatability of pyrite from refractory low grade ore. I used a Wemco lab flotation cell and aimed on analysing factors like collector dosages (PAX), Activator (Copper sulphate),MIBC, pH and others like pulp density and particle size (70 and 150 microns) .However how these factors affect the floatability of the pyrites from low grade …

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Minerals | Free Full-Text | Effects of Pyrite Texture on …

2021-10-18 · An alternative flotation chemistry was applied on Ore B using Na2S for surface cleaning and Na-Metabisulfite (MBS) for pyrite depression in the copper flotation stage. The surface cleaning reduced the rate of oxidation of the framboidal pyrite in Ore B. As a result, the copper recovery could be increased to 52% Cu for Ore B, and 65% for the ...

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FTIR and XPS studies of surface chemistry of pyrite in …

1995-5-1 · @article{osti_63221, title = {Interfacial electrochemistry of pyrite oxidation and flotation. 2: FTIR studies of xanthate adsorption on pyrite surfaces in neutral pH solutions}, author = {Wang, X H}, abstractNote = {Infrared spectra of short carbon chain ferric xanthanes (Fe(SSCOCR){sub 3}) were systematically characterized and compared with that of their …

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Dextrin as a non-toxic depressant for pyrite in flotation …

2004-9-1 · It is interesting to compare depression of pyrite by dextrin and sodium cyanide. Fig. 6 shows the floatability of pyrite with 10 −4 mol/l sodium isopropyl xanthate at pH 8 as a function of the concentration of the two depressants. The depression of pyrite takes place at a lower dextrin concentration in comparison to that needed with sodium ...

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chemistry of pyrite depression in flotation

The depression of pyrite in selective flotation by ... Oct 01, 2016 The depression of pyrite flotation by cyanide may result from one or more of the followi. Home; Products; Case; Solution; ... C6X Series Jaw Crusher Double wedge adjusting device, …

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Selective depression of pyrite with a novel ...

2019-5-1 · Abstract In the flotation of copper sulfides, pyrite is often activated by Cu2+ ions dissolved from copper-bearing minerals in alkaline media (pH ˃ 9), which results in pyrite entering the copper concentrate. To reduce the floatability of pyrite, we designed a novel functionally modified biopolymer, tricarboxylate sodium starch (TCSS), that showed superior depression …

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The flotation of pyrite using xanthate collecters

The flotation properties of pyrite were found to be significantly influenced by variations in the pH. In acidic solutions the pyrite floatability is very high, and recoveries of 95% could be achieved using only a frother. A sharp decrease in floatability was observed in alkaline solutions, possibly due to the formation of hydrophilic ferric ...

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Pyrite Depression in Copper Flotation

2015-10-8 · The Pyrite Depression in a Copper Only Flotation circuit is simple enough. If your froth flotation system only tries to recover chalcopyrite-copper, you need to bring the plant''s pH up to the other side (right side) of the PYRITE curve. The more flotation collector you have on, the higher you will need to increase that pH for effective pyrite ...

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The depression of pyrite in selective flotation by different …

2016-10-1 · DOI: 10.1016/J.MINENG.2016.06.018 Corpus ID: 99106529; The depression of pyrite in selective flotation by different reagent systems – A Literature review @article{Mu2016TheDO, title={The depression of pyrite in selective flotation by different reagent systems – A Literature review}, author={Yufan Mu and Yongjun Peng and Rolf Andreas Lauten}, journal={Minerals …

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Surface chemistry of activation of lime-depressed pyrite in ...

2022-5-28 ·  :The depression of pyrite by lime is attributed to the surface formation of Ca(OH) 2, CaSO 4 and Fe(OH) 3 as determined by XPS analysis. Xanthate flotation tests show that oxalic acid and other organic acids, as well as sulphuric acid and other inorganic acids and their salts can restore xanthate flotation of pyrite after depression by lime.

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Control of pyrite surface chemistry in physical coal …

The U.S. Department of Energy''s Office of Scientific and Technical Information

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2000-Surface chemistry of activation of lime-depressed …

2015-4-2 · AbstractThe depression of pyrite by lime is attributed to the surface formation of Ca(OH) 2, CaSO 4 and Fe(OH) 3 as determined by XPS analysis. Xanthate flotation tests show that oxalic acid and other organic acids, as well as sulphuric acid and other inorganic acids and their salts can restore xanthate flotation of pyrite after depression by lime.

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Quantum-mechanics of pyrite flotation | SpringerLink

2014-3-1 · The authors have carried out molecular modeling of clusters of simple structure and ring structure pyrite. It is suggested to analyze bonding of a collecting agent and cluster atoms using the collector capacity forecasting index. It is shown that butyl dixanthate more vigorously connects to cluster atoms than thionocarbamates, e.g., Z 200 and IETNC. Analysis of the …

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pyrite depression in copper flotation

Depressants for Clay / Flotation depressants ... Clay depression. Various trials have shown the potential of PIONERA BioPolymer as a selective depressant for several gangue materials (Pyrite, Pyrrhotite, Clay or ...

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The depression of pyrite in selective flotation by different …

2016-10-1 · The standard half-cell potential E 0 for the amyl xanthate/di-amyl dixanthogen couple is −0.158 ... The depression of pyrite flotation by cyanide may result from one or more of the following mechanisms: (1) ... The surface and solution chemistry of pyrite flotation with xanthate in the presence of iron ions. Colloids Surf., A, 136 (1–2) ...

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Copper and Pyrite Separation by Selective and …

2016-4-13 · A copper-pyrite mill in Canada uses the 12-cell No. 21 "Sub-A" Flotation Machine, shown above, for roughing, and a 2-cell No. 21 "Sub-A" Flotation Machine for cleaning to produce a fairly coarse pyrite concentrate …

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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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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 …

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Surface chemistry of activation of lime-depressed pyrite in ...

Abstract: The depression of pyrite by lime is attributed to the surface formation of Ca(OH) 2, CaSO 4 and Fe(OH) 3 as determined by XPS analysis. Xanthate flotation tests show that oxalic acid and other organic acids, as well as sulphuric acid and other inorganic acids and their salts can restore xanthate flotation of pyrite after depression by lime.

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The depression of copper-activated pyrite in flotation by …

2016-6-1 · The depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different biopolymers, modified from …

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The depression of pyrite in selective flotation by different …

2016-6-1 · It was interesting to find that 9.5 × 10⁻⁴ mol/L lead ions significantly counteracted the depression of 50 ppm free cyanide on pyrite flotation but did not completely restore the flotation of ...

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Depression of Pyrite in Seawater Flotation by Guar Gum

2020-2-11 · The application of guar gum for pyrite depression in seawater flotation was assessed through microflotation tests, Focused Beam Reflectance Measurements (FBRM), and Particle Vision Measurements (PVM). Potassium amyl xanthate (PAX) and methyl isobutyl carbinol (MIBC) were used as collector and frother, respectively. Chemical species on the pyrite …

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Selectively Depress Copper-Activated Pyrite in Copper …

2021-1-26 · Pyrite depression in the flotation of copper ores is difficult due to the activation of Cu2+ ions on pyrite surface. In this study, the radical chain reaction involving the redox cycling of Cu(I/II) induced by sodium metabisulphite (MBS) was exploited to selectively depress the flotation of copper-activated pyrite at pH 8.0. Electrochemical measurements revealed that the …

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Depression of Pyrite in Seawater Flotation by Guar Gum

The application of guar gum for pyrite depression in seawater flotation was assessed through microflotation tests, Focused Beam Reflectance Measurements (FBRM), and Particle Vision Measurements (PVM). Potassium amyl xanthate (PAX) and methyl isobutyl carbinol (MIBC) were used as collector and frother, respectively. Chemical species on the pyrite surface were …

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FTIR and XPS studies of surface chemistry of pyrite in …

1995-12-31 · @article{osti_276660, title = {FTIR and XPS studies of surface chemistry of pyrite in flotation}, author = {Leppinen, J and Laajalehto, K and Kartio, I and Suoninen, E}, abstractNote = {Efficient separation of pyrite is of great importance for the metallurgical performance of flotation processes. Presently, separation of pyrite by flotation is becoming more and more important …

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Depression Effect of Thioglycolic Acid (TGA) on Flotation …

2022-3-21 · In the present study, the depression effect of thioglycolic acid (TGA) on chalcopyrite and pyrite in the presence of different collectors, including potassium ethyl xanthate (PEX), sodium isopropyl xanthate (SIPX), and mercaptobenzothiazole (MBT) in the flotation separation of molybdenite from copper and iron sulfide minerals was evaluated by micro-flotation and bench …

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(PDF) Depression of Pyrite in Seawater Flotation by Guar …

2020-2-11 · The application of guar gum for pyrite depression in seawater flotation was assessed through microflotation tests, Focused Beam Reflectance Measurements (FBRM), and Particle Vision Measurements (PVM).

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A review on electrochemical behavior of pyrite …

2016-12-1 · It has been found that moderately oxidizing conditions are favorable for collector-less flotation of pyrite while strongly reducing or oxidizing potentials lead to its depression. Increasing the ...

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Pyrite Depression

2022-7-16 · HGMS can develop 20000 gauss strength in the process zone. Since Pyrite is feeble magnetic, we may try in lab model. Today looking to global market we need to process tailing to recover 40%S pyrite to extract S in smelter and also associated Silver, Zinc, Lead. This gives added revenue and reduces smelting costing.

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The depression of pyrite in selective flotation by different …

2016-10-1 · 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 …

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The Flotation of Pyrite using Xanthate Collectors

2020-12-8 · Oxidation of pyrite in air showed a marked effect on the flotation properties of pyrite. In alkaline surroundings the recoveries were reduced by 30%. This effect was not observed during flotation in acidic solutions, since in situ leaching was taking place thus removing the oxidation products from the pyrite surface.

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Pyrite depression in marmatite flotation by sodium …

2011-5-31 · The flotation tests of mineral show that in the presence of SGX, marmatite can be activated by Cu2+ and shows good flotability, while pyrite cannot be activated and therefore shows poor flotability. At the pH value range from 4 to 11, the flotation selectivity between marmatite and pyrite is obvious when the SGX concentration is below 50 mg/L.

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Pyrite depression during coal flotation Part I — Inorganic …

1992-5-1 · This investigation is an exploratory study to evaluate a large number of potential pyrite depressants for use during coal flotation. Subsequently, the more promising reagents can be evaluated in detail. Several reagent categories (such as alkalis, lime, oxidizing agents, reducing agents, specific inorganic ions and dispersants) that were found to be effective pyrite …

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An Insight into Flotation Chemistry of Pyrite …

2018-4-19 · The flotation chemistry between pyrite and isomeric xanthates (butyl xanthate and isobutyl xanthate) was investigated by means of adsorption experiments, surface tension tests, and molecular dynamic simulations in this …

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Surface chemistry of activation of lime-depressed pyrite in ...

The depression of pyrite by lime is attributed to the surface formation of Ca(OH) 2, CaSO 4 and Fe(OH) 3 as determined by XPS analysis. Xanthate flotation tests show that oxalic acid and other organic acids, as well as sulphuric acid and other inorganic acids and their salts can restore xanthate flotation of pyrite after depression by lime.

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The Adsorption of Cu Species onto Pyrite Surface and Its

2016-1-17 · Figure 1 shows that pyrite exhibits good flotation performance at pH range of 4 to 9 when in the absence of CuSO 4, and as much as 80% of the pyrite can be floated.But at a pH range of 9 to 12, pyrite is depressed and the recovery decreases significantly with the increase in pH. The decrease in recovery is attributed to the formation of iron hydroxide on the pyrite …

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chemistry of pyrite depression in flotation

2022-7-19 · The Adsorption of Cu Species onto Pyrite Surface and Its, Know More. Journal of Chemistry is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles on all aspects of fundamental and applied chemistry, He, W-Q Qin, W-Z Li, and K Zeng, Pyrite depression in marmatite flotation by sodium glycerine-xanthate, …

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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 …

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The role of sodium sulfide in the flotation of pyrite …

Pyrite Depression Flotation Sodium sulfide Sulfidization Surface oxidation products ABSTRACT In copper-gold flotation plants, pyrite which is depressed in copper otation is often oated subsequently with the addition of sodium sulfide (Na 2S) to recover the associated gold. For the first time, this study investigated the role of Na

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