Chemistry Of Pyrite Depression In Flotation

Flotation S Komar Kawatra

Eisele T C and Kawatra S K Depression of Pyrite Flotation by Microorganisms as a The Role of Nonpolar Oils as Flotation Reagents Chapter 19 Chemical Reagents in the Mineral Processing Industry Malhotra and Riggs eds Society of

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Depression of Pyrite in Seawater Flotation by Guar Gum

Pyrite flotation recovery was correlated with FBRM and PVM characterization to delineate the pyrite depression mechanisms by the guar gum The high flotation recovery of pyrite with PAX was significantly lowered by guar gum indicating that this polysaccharide could be used as an effective depressant in flotation with sea water

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Surface Chemical Studies on Pyrite in the Presence of Polysaccharide

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 11 with a maximum around pH 10 for both polymers

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Kinetic Investigation of Initial Oxidative Dissolution of Pyrite in

Froth flotation is a common mineral processing technique that is used to remove low economic gangue minerals such as pyrite from ore ions however few quantitative results are available to determine the best physico chemical condition to depress pyrite floatability Fe hydroxide formation oxidative dissolution on a pyrite surface

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Pyrite Oxidation And Its Control Amd Molecular Oxidation Mechanisms

PlantsControl of Pyrite Surface Chemistry in Physical Coal Cleaning Technical Progress Report for the Ninth Quarter September 1 November 30 combustor separation of pyrite from coal by flotation is based on exploiting the wettability difference between coal and pyrite There is evidence that the wettability of

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Alternatives For Sodium Cyanide For Flotation Control October 1981 EPA

Key words which were used in the broadly defined search were the following flotation ore treatment chalcocite chalcopyrite sphalerite galena pyrite and depress A total of 38 articles relevant to the topic of pyrite depression were identified in the computer search

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The Depression Effect and Mechanism Analysis of Locust Bean Gum in

The flotation separation of chalcopyrite from pyrite using locust bean gum as depressant has been studied and the mechanism has been results show that both chalcopyrite and pyrite are floatable in the tested pH range from 3 to 9 and the flotation separation of chalcopyrite from pyrite can t be realized without the addition of bean gum can adsorb on the surfaces

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Sodium Metabisulfite MBS for pH Control and Pyrite Depression in Flotation

Sodium Metabisulfite aka MBS is used for pH control in froth flotation to control Pyrite depression Below is a graph showing pH VS pyrite recovery at various collector addition rates It is also used to prevent flotation of sphalerite by copper activation in the presence of Tennantite/Covellite in the ore For pyrite flotation you see maximum

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Minerals Engineering Conferences Flotation 19

The cost is £95 which includes postage and contains the following papers Keynote Lecture The scientific legacy of Joseph Kitchener its impact in flotation and colloid science J Ralston University of South Australia Australia Unlocking the true value of chemicals in mineral processing

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Yongjun Peng 0000 0001 9398 3963 ORCID

Starch chemical modification for selective flotation of copper sulphide minerals from carbonaceous material A critical review Electrochemical and spectroscopic studies of pyrite cyanide interactions in relation to the depression of pyrite flotation Minerals Engineering 2024 06 The mechanism of pyrite depression at acidic pH by

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Flotation experiment research on a polymetallic sulfide ore of

Journal of Chemical and Pharmaceutical Research 2024 6 4 121 127 priority flotation zinc and pyrite from the bulk flotation tailings was used The concentrate indexes of the grade of copper lead and zinc were % % and % respectively and the selectively with depression of zinc and iron followed by reflotation of

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An Overview of Technologies and Selective Depressing Agents for

Preferential flotation of talc before the flotation of chalcopyrite [1] Using frothing agents with good selectivity to float some parts of talc before the flotation of sulfide minerals can reduce the interference of talc to the chalcopyrite flotation 3 Selective Depressing Agents

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The depression of pyrite in selective flotation by different reagent

2024 Depression of pyrite observed below pH 2 is due to decom position of xanthate while the depression above pH 11 is due to the thermodynamic instability of dixanthogen and the formation of ferric hydroxide islands on pyrite surface Leppinen 1990 Fuerstenau et al 2024 While it is clear that flotation or depres

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An electrochemical investigation of pyrite flotation and depression

The flotation and depression of pyrite are interpreted in terms of mixed potential mechanisms INTRODUCTION Pyrite is a common constituent of base metal ore deposits and the flota tion and depression of this mineral is important in the extraction of the valuable components

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Beneficiation of Arsenic Bearing Complex Sulphide Ore by Flotation

Sulphur oxy depressants are added to the flotation pulp in the form of sodium sul phite sodium bi sulphite sodium metabisulphite or sulphur dioxide for the depression of pyrite sphalerite and galena Grano et al 1997 1997a 1997b Khmeleva et al 2024 2024 2024 Gül 2024 studied the effects of sodium meta bisulphite and acti

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The depression of pyrite in selective flotation by different reagent

DOI / 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 Engineering} year={2024

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Research Development of Depression and Activation Separation of Pyrite

At present the main process of flotation of nonferrous metal sulfide ores containing pyrite is to first recover other useful metal minerals with the inhibition of pyrite and then activate and collect pyrite However due to the crystal defects and the difference in the chemical composition of pyrite and the diversity and complexity of the

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17 Flotation of Gold Ores Aalto

Flotation of Gold Ores INTRODUCTION Some deposits contain up to 3% pyrite Size of the gold contained Use of lime often results in the depression of native gold and gold bearing sulphides The optimum flotation pH ranges between and The type of frother also plays an important role in the flotation of native gold and

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Dextrin as a Regulator for the Selective Flotation of Chalcopyrite

View Dextrin as a Regulator for the Selective Flotation of Chalcopyrite Galena and Pyrite from CHE INORGANIC at University of Concepción Concepción 301 Canadian Metallurgical Study Resources

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Minerals Free Full Text Mineralogy and Innovative Flash Flotation

The flotation separation of common copper lead ore includes copper depression and lead flotation or lead depression and copper flotation The former often uses cyanide to depress chalcopyrite pyrite and sphalerite the latter uses dichromate to depress galena and also has depression effect on pyrite [28 29]

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Central South University

ANG et al [14] used oxidizing agents such as sodium hypochlorite and hydrogen peroxide to activate the flotation of cyanide depressed pyrite The activation mechanism was attributed to the oxidation of cyanide to cyanate which eliminated the depression effect of cyanide on pyrite flotation R

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Fundamentals for optimization of cyanide processes in flotation

Theoretical substantiation of activation deactivation and depression processes in flotation of copper pyrite copper zinc and polymetallic ores with the use of cyanide as well as their regularities are considered Physico chemical models derived for various cyanide processes in flotation and automatic control systems

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The Influence of Cyanide Salts and Ferrous Sulphate on Pyrite Flotation

whereas the commonest reagents for its depression in lead zinc ore flotation are of cyanide type However cyanides are not mainly in use for pyrite depression in copper ore flotation Depressing effect is achieved with OH ions at high pH mostly with lime The first published data about the depressing effect of cyanide were found in 1922

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A study on the effect of active pyrite on flotation of porphyry copper ores

Active pyrite is one of the most undesirable phenomena in the flotation of porphyry copper ores Misreported pyrite into copper concentrates decreased the grade and recovery of copper In this study the effective parameters on the flotation process including grinding condition and chemical parameters were evaluated in order to decrease the

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Flotation behaviour of chalcopyrite and pyrite with calium hypochlorate

The flotation test results of pyrite and chalcopyrite show calium hypochlorate and sodium humate both are good depressants for pyrite and don t depress mixed depressants can depress pyrite on contact angle test dates mineral surface wetting energy were calculated by Yang s evacuation its results show the reasons of good depression performance of mixed depressants

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Recycling of process water Effect of calcium and sulphate ions in

Yamamoto 1980 ii reaction with the pyrite surface to form hydrophilic iron oxides Khmeleva et al 2024 and iii a decrease of redox potential of the pulp below a level at which binding/oxidation of a collector electron donor becomes energetically unfavourable Forsberg 1991 effects were proposed for depression of pyrite flotation

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Physico chemical factors in flotation of Cu Mo Fe ores with seawater a

5 MBS at regrinding and cleaning stages to depress pyrite at pH around Hence rougher circuit operating without or small amount of lime and depression of pyrite in cleaning stages at low pH are the key factors for the Cu Mo Fe flotation technology in seawater This scheme is

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pyrite flotation conducted

The depression of pyrite in selective flotation by Oct 01 2024· A study conducted by Mu et al 2024 demonstrated that three lignosulfonate based biopolymers DP 1775 DP 1777 and DP 1778 differing in molecular weight and polymer chemistry depressed the flotation of un activated pyrite at pH 5 copper activated pyrite at pH 9 and

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Pyrite Depression By Reduction Of Solution Oxidation Potential US EPA

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 This was accomplished by using various chemical reagents as depressants and activators The

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