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Mechanism of Cu Ion Targeting Combined with an Organic …
The N and S atoms in −NCS and metal ions formed chemical bonds, which were the primary mechanism of the interaction between N,N-DDS and pyrite. This process reduces …
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Lactic acid as selective depressant for flotation separation of
Semantic Scholar extracted view of "Lactic acid as selective depressant for flotation separation of chalcopyrite from pyrite and its depression mechanism" by Guang Han et al. ... Chemistry; Journal of Molecular Liquids; View via Publisher. Save to Library Save. ... ABSTRACT The depression of pyrite in the flotation separation of molybdenum ...
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The depression of pyrite in selective flotation by different reagent
Depression of pyrite in a low-alkaline system has sparked soaring interests for the multi-metal sulfide minerals flotation recently. This study investigates effects of combined …
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A review on electrochemical behavior of pyrite in the froth flotation
Small changes in the surface chemistry of pyrite may significantly affect its floatability [86]. ... Depression mechanism of pyrite flotation by these organic compounds has been investigated in both non-activated and Cu-activated states [232]. Electrochemical studies conducted on non-activated pyrite flotation showed that the biopolymers, ...
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Activation flotation of lime-depressed pyrite with carbon dioxide
The activation properties of ammonium oxalate on the flotation of pyrite and arsenopyrite in the lime system were studied in this work. Single mineral flotation tests showed that the ammonium ...
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FTIR and XPS studies of surface chemistry of pyrite in flotation
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 for reduction of sulfur in coal. In this work Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Photoelectron Spectroscopy (XPS) were used to study the …
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(PDF) Post-regrind selective depression of pyrite in pyritic copper
The pyrite rougher concentrate was obtained by two-stage copper and pyrite rougher flotation using the conditions in Table 1 and reported in Agorhom et al. (2013). However, in the present studies, the focus is to examine flotation depression of pyrite after regrinding the combined pyrite rougher concentrates using aeration and DETA (Fig. 1).
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Evaluate the Depression of High-Concentration Pyrite in …
chemical studies. As pyrite feed grade increased from 5% to 25%, the anodic role of 30 wt% Cr steel did not change, but the anodic role of chalcopyrite and the cathodic role of pyrite were enhanced, promoting ... pyrite depression; copper flotation; galvanic interaction 1. Introduction Chalcopyrite (CuFeS 2) is the most crucial copper (Cu) mineral
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CHAPTER 7 FLOTATION OF SULPHIDE MINERALS
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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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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Mechanism of Cu Ion Targeting Combined with an Organic …
In this study, pyrite was used as the research object, and the behavior and mechanism of a copper-ion-enhanced organic depressant in depressing pyrite flotation were studied. Microflotation experiments showed that, after the addition of CuSO4 and N,N-dimethyldithiocarbamate (N,N-DDS), the floating collection efficiency of pyrite declined from …
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Interaction mechanism of cyanide with pyrite during the …
The toxic cyanides in cyanide residues produced from cyanidation process for gold extraction are harmful to the environment. Pyrite is one of the main minerals existing in cyanide residues. In this work, the interaction of cyanide with pyrite and the decyanation of pyrite cyanide residue were analyzed. Results revealed that high pH value, high cyanide concentration, and …
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Selectively Depress Copper-Activated Pyrite in Copper Flotation …
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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Unveiling the depression role of quercetin in selective flotation
Froth flotation is an effective method for separating chalcopyrite from pyrite, using various flotation reagent depressants to amplify both minerals' surface differences in hydrophobicity [7], [8].Generally, lime is the depressant of pyrite in most of the concentrator plants [9], [10].There are two aspects to the depression mechanism of lime on pyrite.
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The depression of pyrite in selective flotation by different reagent
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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Assessing the depression of high-concentration pyrite in copper
The strong depression of pyrite in copper flotation at highly alkaline pH is owing to pyrite oxidation and the formation of hydrophilic ferric hydroxide (Fe(OH) 3) on pyrite surfaces …
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The depression of copper-activated pyrite in flotation by …
DOI: 10.1016/J.MINENG.2016.06.011 Corpus ID: 99253807; The depression of copper-activated pyrite in flotation by biopolymers with different compositions @article{Mu2016TheDO, title={The depression of copper-activated pyrite in flotation by biopolymers with different compositions}, author={Yufan Mu and Yongjun Peng and Rolf Andreas Lauten}, journal={Minerals …
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An electrochemical investigation of pyrite flotation and depression
Sulphide gives rise to an anodic wave preceding the wave due to xanthate oxidation. The flotation and depression of pyrite are interpreted in terms of mixed-potential mechanisms. ... Gaudin, 1957). Detailed studies involving pyrite, however, are relatively limited. The chemistry of pyrite flotation ancl depression has recently been reviewed by ...
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An electrochemical investigation of pyrite flotation and depression
Its flotation can also be enhanced by the activation of copper or lead ions emanating from other minerals. Depressants are generally required to selectively depress pyrite. In this article, a comprehensive review of the fundamental studies of depression mechanisms and effectiveness of commonly used reagent systems to depress pyrite is presented.
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The depression of pyrite in selective flotation by different …
In this article, a comprehensive review of the fundamental studies of depres-sion mechanisms and effectiveness of commonly used reagent systems to depress pyrite is presented.
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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).
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Research Progress of Application and Interaction Mechanism of …
The adsorption of GuG on the pyrrhotite surface was chemical adsorption, while GuG was mainly adsorbed on the chalcopyrite surface by hydrogen bonding. Therefore, GuG has a significant depression effect on pyrite flotation and …
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Depression of Pyrite by Trihydroxybenzene During Collectorless Flotation
The iron disulfide FeS 2 or the mineral pyrite, present in all mineral deposits, is the most abundant metallic impurity that occurs along with valuable minerals, therefore the depression for the selective separation of this species during flotation is a continually researched topic [].The comparable depressants evaluated are of the organic type such as carrageenan, a …
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Enhanced pyrite depression through nitrogen-aerated flotation …
DOI: 10.1016/j.apt.2024.104424 Corpus ID: 269071577; Enhanced pyrite depression through nitrogen-aerated flotation under low alkalinity conditions @article{Wang2024EnhancedPD, title={Enhanced pyrite depression through nitrogen-aerated flotation under low alkalinity conditions}, author={Yunfan Wang and Dayong Wei and Shuming Wen and Qiqiang Lin and …
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Analysis of Pyrite Depression During Flotation in the Presence of
The tests for flotation pyrite depression were performed in a 1 L self-aerated laboratory cell from the Denver brand. It had an impeller at the bottom of the apparatus and a …
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Biodegradable acids for pyrite depression and green flotation
Polysaccharide-based depressants have shown satisfactory performance for the depression of pyrite in various flotation systems. However, due to the continuous decrease in the grade and quality of various ore deposits and the increased environmental restrictions, it would be beneficial to introduce other eco-friendly depressants to replace or ...
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Surface chemistry of activation of lime-depressed pyrite in …
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 …
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Enhanced pyrite depression through nitrogen-aerated flotation …
The effective depression of pyrite in air flotation by adjusting pulp pH could only be achieved under high alkalinity conditions. However, compared with air aeration, the depression …
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Effect of pyrite textures and composition on flotation performance: …
Thus, understanding why pyrite's flotation performance varies within orebodies and the features affecting its floatability is critical for an efficient depression and possible reclamation of pyrite. Natural pyrite can exhibit different electrochemical properties, chemical composition, and texture depending on the ore genesis.
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Electrochemical and spectroscopic studies of pyrite–cyanide
Pyrite is the most abundant sulfide mineral which requires being separated from other base metal sulfide minerals in differential flotation. The chemistry for pyrite flotation and depression was reviewed by Ball and Rickard (1976).In general, pyrite flotation and depression strongly depend on pH.
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