chemistry of pyrite depression in flotation

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 ...

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Pyrite Depressant - Froth Flotation (Sulphide Oxide ...

2021-11-8  Flotation of copper at different alkaline pH from 7upto 10 and using different Xanthates as collector vs. recovery of copper may give some clue. Minimum Pyrite obtained in copper concentrate is the starting point for further flotation test work. Depressing Pyrite is always a tricky matter.

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Pyrite depression by AMBS - Froth Flotation (Sulphide ...

2021-11-6  While I was studying flotation using seawater, I had a problem with understanding the reason why Aeration and Sodium Metabisulfite is used as a Pyrite depressant in Cu-Mo flotation in seawater. An article said that sufficient Cu-Mo

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The chemistry of flotation activation and depression of ...

Flotation studies demonstrated that freshly ground arsenopyrite and pyrite are non-floatable in the absence of xanthate as a collector or strong iron-complexing agent: EDTA (hydrophilic). Good flotation was observed for both minerals with EDTA or ethyl xanthate. The floatability depends strongly on the pH value and concentration.

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Pyrite depression by dextrin in flotation with xanthates ...

Depression of pyrite by dextrin in flotation with xanthates has been studied. The adsorption of dextrin and xanthates at the pyrite/aqueous solution interface has been investigated through electrokinetics, Raman spectroscopy and batch adsorption studies using oxidized pyrite. Microflotation studies were undertaken to evaluate the pyrite depression with dextrin using ethyl and propyl xanthates ...

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Effects of Pyrite Texture on Flotation Performance of ...

2021-10-18  Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to demonstrate influence of pyrite mineralogy on the flotation of copper (sulphidic) ores and develop alternative conditions to improve the performance.

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Pyrite Depression By Reduction Of Solution Oxidation

In most sulfide flotation systems pyrite depression is desired, therefore, it should be possible to use various chemicals to reduce the oxidation potential of the solution and depress pyrite by preventing the formation of the collector, dixanthogen. On this basis,the purpose of our research was to establish 1.

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Journal of Industrial and Engineering Chemistry

Oxidation of pyrite and its effects on the flotation, activation of pyrite, depression of pyrite, are also discussed in detail in this review. In addition, interactions betweenpyrite and ...

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Flotation behaviors of pyrites with different chemical ...

2004-5-1  Microflotation tests, electrokinetic and electrochemical measurements were carried out to investigate the flotation behavior of pyrite samples taken from different regions of Turkey. Chemical analyses and mineralogical examinations showed that these pyrite samples have different impurities and structural properties. The flotation characteristics of pyrites using ethyl xanthate were similar ...

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The depression of quartz in sulphide flotation

2020-10-13  hence depression of the gangue minerals in the flotation of sulphides from an artificial pyrite-quartz mixture. Flotation . of . any given mineral is intimately bound up with the degree of dispersion or flocculation of that mineral in the pulp and it may be aaid(l4) that flotation is not (14) Wark, I.i. Principles of Flotation.

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Professor Yongjun Peng - School of Chemical Engineering ...

2021-11-15  Depression of pyrite in the flotation of chalcopyrite using biopolymer depressants. XXVIII International Mineral Processing Congress Proceedings , Québec City, Canada , 11-15 September 2016 . Québec City, Canada : Canadian Institute Mining, Metallurgy and Petroleum .

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Heterocoagulation of chalcopyrite and pyrite minerals in ...

Heterocoagulation between various fine mineral particles contained within a mineral suspension with different structural and surface chemistry can interfere with the ability of the flotation processes to selectively separate the minerals involved. This paper examines the interactions between chalcopyrite (a copper mineral) and pyrite (an iron ...

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chemistry of pyrite depression in flotation

the depression of pyrite by lime is attributed to the surface formation of ca(oh)2, caso4 and fe(oh)3 as determined by xps analysis. xanthate flotation tests show that oxalic acid and other.a study of the interfacial chemistry of pyrite and coal in,jan 01, 1993 articleosti_10158220, title a study of the interfacial chemistry of pyrite and coal ...

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2020-The synergistic depression phenomenon of an

2021-3-2  The depression of pyrite (FeS2) through an organic depressant is not only ineffective but also nonselective which causes poor selectivity. In this research, the depression effect of an organic polymer ‘poly-γ-glutamic acid (γ-PGA, a widely available class of polysaccharides)’ on pyrite flotation was improved by the addition of lime (CaO).

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Pyrite depression by dextrin in flotation with xanthates ...

Depression of pyrite by dextrin in flotation with xanthates has been studied. The adsorption of dextrin and xanthates at the pyrite/aqueous solution interface has been investigated through electrokinetics, Raman spectroscopy and batch adsorption studies using oxidized pyrite. Microflotation studies were undertaken to evaluate the pyrite depression with dextrin using ethyl and propyl xanthates ...

More

Pyrite Depression By Reduction Of Solution Oxidation

In most sulfide flotation systems pyrite depression is desired, therefore, it should be possible to use various chemicals to reduce the oxidation potential of the solution and depress pyrite by preventing the formation of the collector, dixanthogen. On this basis,the purpose of our research was to establish 1.

More

US5853571A - Pyrite depressant useful in flotation ...

The present invention relates to a process for separating pyrite from sulfide ores and coal during flotation separation which comprises the depressing of pyrite with from about 0.05 to 0.75 kilograms per ton of concentrate solids using a pyrite depressant compounds selected from the group consisting of R1, R2, R3 N.sup.+ O.sub.2 H.sub.4 SR4X.sup.-

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The depression of quartz in sulphide flotation

2020-10-13  hence depression of the gangue minerals in the flotation of sulphides from an artificial pyrite-quartz mixture. Flotation . of . any given mineral is intimately bound up with the degree of dispersion or flocculation of that mineral in the pulp and it may be aaid(l4) that flotation is not (14) Wark, I.i. Principles of Flotation.

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Heterocoagulation of chalcopyrite and pyrite minerals in ...

Heterocoagulation between various fine mineral particles contained within a mineral suspension with different structural and surface chemistry can interfere with the ability of the flotation processes to selectively separate the minerals involved. This paper examines the interactions between chalcopyrite (a copper mineral) and pyrite (an iron ...

More

Professor Yongjun Peng - School of Chemical Engineering ...

2021-11-15  Depression of pyrite in the flotation of chalcopyrite using biopolymer depressants. XXVIII International Mineral Processing Congress Proceedings , Québec City, Canada , 11-15 September 2016 . Québec City, Canada : Canadian Institute Mining, Metallurgy and Petroleum .

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The effect of EDTA on the adsorption efficiency of ...

Abstract: In flotation process of the mineral recovery operation, the adsorption of Xanthate (KEX)(potassium ethyl xanthate) on copper activated pyrite, is affected by oxides,and hydroxides present on the surface of mineral sulfide. In order to increase the adsorption efficiency of Xanthate (KEX) on pyrite, a complexing agent EDTA (ethylene diamine tetra acetic) was used.

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paper TITLE CHAPTER PDF 925 931 929 - IMPC

2015-2-17  03. Flotation Chemistry 326 423 Effect of biosolids and their main components in the concentration of copper sulphide ores 03. Flotation Chemistry 327 533 Effect of water composition on flotation of lead and zinc sulphide ore 03. Flotation Chemistry 328 570 Study on the flotation of auriferous pyrite by Y-89 03. Flotation Chemistry 329 672

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Surface Chemical Studies on Pyrite in the Presence of ...

The interaction of dextrin and guar gum with pyrite has been investigated through adsorption, flotation, and electrokinetic measurements. The adsorption densities of the polysaccharides onto pyrite reveal a region of higher adsorption density in the pH range 7.5-11, with a maximum around pH 10 for b

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Selective separation of chalcopyrite from pyrite with a

2019-6-5  Pyrite depression in copper ore flotation often requires large doses of inorganic depressants that lead to high toxicity, high costs, and low selectivity. Thus, this study offers a novel pyrite depressant, polyglutamic acid (PGA), in the selective flotation of chalcopyrite with xanthate as a collector.

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chemistry of pyrite depression in flotation

the depression of pyrite by lime is attributed to the surface formation of ca(oh)2, caso4 and fe(oh)3 as determined by xps analysis. xanthate flotation tests show that oxalic acid and other.a study of the interfacial chemistry of pyrite and coal in,jan 01, 1993 articleosti_10158220, title a study of the interfacial chemistry of pyrite and coal ...

More

The depression of quartz in sulphide flotation

2020-10-13  hence depression of the gangue minerals in the flotation of sulphides from an artificial pyrite-quartz mixture. Flotation . of . any given mineral is intimately bound up with the degree of dispersion or flocculation of that mineral in the pulp and it may be aaid(l4) that flotation is not (14) Wark, I.i. Principles of Flotation.

More

paper TITLE CHAPTER PDF 925 931 929 - IMPC

2015-2-17  03. Flotation Chemistry 326 423 Effect of biosolids and their main components in the concentration of copper sulphide ores 03. Flotation Chemistry 327 533 Effect of water composition on flotation of lead and zinc sulphide ore 03. Flotation Chemistry 328 570 Study on the flotation of auriferous pyrite by Y-89 03. Flotation Chemistry 329 672

More

2020-The synergistic depression phenomenon of an

2021-3-2  The depression of pyrite (FeS2) through an organic depressant is not only ineffective but also nonselective which causes poor selectivity. In this research, the depression effect of an organic polymer ‘poly-γ-glutamic acid (γ-PGA, a widely available class of polysaccharides)’ on pyrite flotation was improved by the addition of lime (CaO).

More

US5853571A - Pyrite depressant useful in flotation ...

The present invention relates to a process for separating pyrite from sulfide ores and coal during flotation separation which comprises the depressing of pyrite with from about 0.05 to 0.75 kilograms per ton of concentrate solids using a pyrite depressant compounds selected from the group consisting of R1, R2, R3 N.sup.+ O.sub.2 H.sub.4 SR4X.sup.-

More

Pyrite Depression By Reduction Of Solution Oxidation

In most sulfide flotation systems pyrite depression is desired, therefore, it should be possible to use various chemicals to reduce the oxidation potential of the solution and depress pyrite by preventing the formation of the collector, dixanthogen. On this basis,the purpose of our research was to establish 1.

More

Pyrite depression by dextrin in flotation with xanthates ...

2018-10-4  of carbonaceous pyrite in copper flotation, depression of lead in lead-copper bulk separation (Bulatovic, 2007) and depression of hematite and apatite in their reverse flotation against siliceous minerals (Lin and Burdick, 1988). Dextrin dosages of up to 1,400 g/Mg is reported.

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EFFECT OF GRINDING CHEMISTRY ON THE

2017-12-17  The influence of pulp chemistry on the flotation performance of sulphide ores has been widely studied. It is well recognised that shifting from a reductive to an oxidative grinding environment affects the pulp chemistry and improves the flotation performances of sulphide ores.

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

2000-12-6  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. In terms of XPS analysis, solution chemistry calculations and

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Dr Yufan Mu - UQ Researchers

The depression of pyrite in selective flotation by different reagent systems - a Literature review. Mu, Yufan, Peng, Yongjun and Lauten, Rolf A. (2016). The depression of pyrite in selective flotation by different reagent systems - a Literature review. Minerals Engineering, 96-97, 143-156. doi: 10.1016/j.mineng.2016.06.018

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Research Activities Related to Flotation Process

2020-7-10  Beattie and Poling [25] studied the surface chemistry of arsenopyrite and its depression in flotation using xanthates (i.e. O-alkyl dithiocarbonates) by oxidizing agents. The mechanism of the action of reducing reagents (as the sulphur-containing salts) during flotation in acidic media was related to the role of dissolved ].

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Electrolytic flotation of pyrite, Journal of Chemical ...

1994-3-1  Electrolytic flotation, a rather unconventional flotation technique used in effluent treatment, was investigated on pyrite; the process was enhanced by xanthate and also a cationic collector. This was then compared with classical floatability experiments. Zeta‐potential measurements, under similar pulp conditions, were carried out to explain the process mechanism. The mineral flotation ...

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