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thiols in the flotation of minerals

The effect of thiol collector mixtures on the flotation of

Sep 01, 2013· Thiol collector mixtures are commonly used in the flotation of base metal sulphides and platinum-bearing ores. There are synergistic benefits claimed for these collector mixtures, with mixtures lowering total dosage requirements, improving coarse particle recovery and the rate of flotation.

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The effect of mixed thiol collectors on the flotation of

Oct 01, 2012· The base metal sulphide and platinum mineral flotation processes make use of thiol collectors to induce selective hydrophobicity onto the valuable minerals in order to separate them from the gangue in the froth phase. For some time use has been made of thiol collector mixtures because of evidence of enhanced performance over single collectors.

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The effect of thiol collector mixtures on the flotation of

In this study, the flotation experiments of a single mineral and mixed minerals were performed using chitosan with different molecular weights (MW = 2−3, 3−6, 10 and 100 kDa) as a depressant

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Method of mineral ore flotation by atomized thiol

We claim: 1. A method for the processing of mineral ore comprising: forming ore pulp suitable for froth flotation processing, conditioning said ore pulp with a collector comprising a mixture of a thiol and the corresponding oxidized thiol, wherein said thiol and said corresponding oxidized thiol are introduced into said ore pulp by atomisation, and

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Synergistic effects between Thiol collectors used in the

The synergism of mixtures of thiol collectors in the flotation of low grade pyrite ores, XX International Minerals Processing Congress, (accepted for publication). Vlll . ix TABLE OF CONTENTS PAGE

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The effect of mixed thiol collectors on the flotation of

The mechanism whereby thiol collectors adsorb onto a mineral surface has been widely studied. Most of these studies examine the mineral surface at equilibrium state and, often, well above

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Chemisorption of Thiols on Metals and Metal Sulfides

Abstract. This chapter reviews the adsorption of thiols at metal and metal sulfide surfaces. The motivation for studying these systems derives from the interaction of this interesting group of organic compounds with native metal and sulfide mineral surfaces being the key chemical step in the separation and concentration of such minerals from their ores by froth flotation.

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Collector Mechanism I. Thiol Collectors in Sulfide Minerals

Abstract. As described in Chapter 2 sulfide minerals are characterized by their chemical reactivity. This directly influences the action of the sulfide minerals with flotation

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Flotation ‘19 Minerals Engineering International Online

A. Wang, S. Mitra, M.M. Hoque and G. Evans (The University of Newcastle, Australia) In this study, a novel kinetic modelling framework is suggested to predict the desired mineral particles recovery based on flotation

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NICKEL AND COBALT ORES: FLOTATION

lation of minerals, especially Rne sulRdes with coarse gangue minerals, thus leading to nickel loss. Flotation Practice in Nickel Sul\de Deposits Nickel sulRde minerals such as pentlandite can, in general, be separated from their gangue by Sotation using a thiol group of collectors like xanthates and alkyl dithiophosphates in the presence of

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Synergistic effects between Thiol collectors used in the

The synergism of mixtures of thiol collectors in the flotation of low grade pyrite ores, XX International Minerals Processing Congress, (accepted for publication). Vlll . ix TABLE OF CONTENTS PAGE

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Minerals Free Full-Text Degradation of Thiol

Froth flotation is extensively used to separate valuable minerals from sulfide ores. Thiol collectors, including xanthates, dithiophosphates, and dithiocarbamates, are important flotation reagents which can render sulfide minerals hydrophobic and facilitate bubble attachments [].As a huge amount of sulfide ores are treated annually by froth flotation, the quantities of consumed collectors are

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The use of mixed thiol collectors in the flotation of

The use of mixed thiol collectors in the flotation of Nkomati sulfide ore Constance K. Nyambayo A thesis submitted to the faculty of Engineering and the Built Environment, University of Mixtures of collectors are widely used in sulfide and platinum group mineral (PGM) flotation, and a

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The role of dithiophosphate as a co-collector in the

Oct 01, 2012· Abstract The present study investigates the application of thiol collectors and their mixtures on the flotation of copper-silver-gold minerals from a new copper mine located in northern Norway. The copper minerals (chalcopyrite, chalcocite, and bornite) are uniformly distributed in all size ranges in the ore sample under study.

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Minerals Free Full-Text The Behaviour of Mixtures of

The use of thiol collector mixtures has become common in the flotation of platinum bearing ores and this has proved to be beneficial in mineral recoveries and grades. However, with the change in process water quality, resulting from water recycling and reuse in flotation circuits, this practice and its reported benefits may be affected.

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Flotation ‘19 Minerals Engineering International Online

A. Wang, S. Mitra, M.M. Hoque and G. Evans (The University of Newcastle, Australia) In this study, a novel kinetic modelling framework is suggested to predict the desired mineral particles recovery based on flotation

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Fundamental StudiesoftheFlotationProcess

ofminerals. Flotation isused inthe processing ofthe bulk ofthe world's non-ferrous metals, aswellasofa growing proportion ofits iron, non-metallic minerals, and coal.However, until the middle ofthe 1950's,the process played a less prominent part on the South African mineral-extraction scene than it did in other

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Surface Chemistry of Froth Flotation [electronic resource

Flotation Surfactants Collector Mechanism I. Thiol Collectors in Sulfide Minerals Collector Mechanism II. Non-Thiol Collectors Mechanism of the Action of Modifying Agents Frothers and Frothing Flotation Kinetics and Fine Particle Flotation Erratum to: Flotation Kinetics and Fine Particle Flotation

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Flotation Of Nickel Minerals

Flotation Of Nickel Minerals. Flotation of Nickel Abstract Froth flotation is widely used for concentration of base metal sulphide minerals in complex or One of optimum conditions for the flotation of nickel copper and cobalt from a nickel copper sulphide ore The parameters parameters for the flotation of base metals from a nickel copper sulphide ore 2 Materials and Methods 2 1.

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NICKEL AND COBALT ORES: FLOTATION

lation of minerals, especially Rne sulRdes with coarse gangue minerals, thus leading to nickel loss. Flotation Practice in Nickel Sul\de Deposits Nickel sulRde minerals such as pentlandite can, in general, be separated from their gangue by Sotation using a thiol group of collectors like xanthates and alkyl dithiophosphates in the presence of

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(PDF) Thiol collector blends for improved PGM recovery: a

Different thiol collectors are widely used to improve the flotation performance of PGM-containing ore. They are used either as a single collector or as a collector blend.

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The effect of using pure thiol collectors on the froth

electron affinity for sulphide minerals and are sulphur donors, thus they are preferred collectors for the froth flotation of the sulphide mineral ores. The xanthates are the mostly used class of thiol collectors (Adkins & Pearse, 1992). This is primarily due to their availability and

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Electrochemistry of Sulphide Flotation AusIMM

Electrochemical investigations of the flotation of sulphide minerals are re- viewed. Flotation with thiol collectors is interpreted in terms of a “mixed poten- tial” model in which the process leading to hydrophobicity is the anodic oxidation of the collector at the mineral surface and this is driven by the cathodic reduc- tion of oxygen.

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Reactivities of some thiol collectors and their

The most commonly used collectors for sulfide minerals in the mining industry are the thiol collectors for the recovery of these minerals from their associated gangues by froth flotation. For this reason, a great deal of attention has been paid to understand the attachment mechanism of thiol collectors to metal sulfide surfaces. The density functional theory (DFT) calculations at the B3LYP/3

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