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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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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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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(PDF) Diethylenetriamine depression of Cu-activated pyrite

The results showed that DETA affects the flotation behaviour and surface chemistry of pyrite. However, high dosages are required. ... (OH)2 depression on the flotation separation of chalcopyrite ...

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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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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 mechanism of sulfite ions on sphalerite and Pb

The depression mechanism of sulfite ions on sphalerite and Pb2+ activated sphalerite in the flotation separation of galena from sphalerite still lacked in-depth insight. Therefore, the depression mechanism of sulfite ions on sphalerite and Pb2+ activated sphalerite in the flotation separation of galena from sphalerite was further systematically investigated with …

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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 …

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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(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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Electrochemical and spectroscopic studies of pyrite–cyanide

Surface cyanoferric species were identified, both electrochemically and spectroscopically, on pyrite surface in the presence of cyanide, inhibiting the oxidation of pyrite …

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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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Selective depression of pyrite with a novel functionally modified

In the flotation of copper sulfides, pyrite is often activated by Cu 2+ 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 selectivity …

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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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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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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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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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An Insight into Flotation Chemistry of Pyrite with Isomeric

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 work. The flotation chemical results were confirmed and further interpreted by quantum chemical calculations. The experiment results demonstrated …

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Activation flotation of lime-depressed pyrite with carbon dioxide

Activation flotation of lime-depressed pyrite by sulfuric acid (H 2 SO 4) is usually accompanied by safety hazards and environmental pollution.Exploring eco-friendly, economical and effective activator to replace H 2 SO 4 holds great significance for the sustainable development of mining industry. In this study, carbon dioxide (CO 2) as a potential activator …

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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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An electrochemical investigation of pyrite flotation and depression

DOI: 10.1016/0301-7516(77)90004-7 Corpus ID: 95172929; An electrochemical investigation of pyrite flotation and depression @article{Janetski1977AnEI, title={An electrochemical investigation of pyrite flotation and depression}, author={Noel Janetski and S. I. Woodburn and Ronald Woods}, journal={International Journal of Mineral Processing}, year={1977}, volume={4}, pages={227 …

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Fenton oxidation modification mechanism of pyrite and its …

Fenton oxidation modification exhibited desirable depression on the flotation of pyrite, and had negligible impact on the chalcopyrite floatability in this paper. This activity provided a viable option for the Cu-S flotation separation. The corresponding depression mechanism on pyrite lied in the formation of multitude hydrophilic species

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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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(PDF) Pyrite depression by dextrin in flotation with xanthates

As seen dextrin did not effectively impair the pyrite flotation when the pyrite was oxidized for only 30 min, because the surface density of ferric hydroxide was low, which brought about low dextrin adsorption on the pyrite. With 200 mg/dm3 dextrin, the floatability of pyrite was 60 and 45% with propyl and ethyl xanthate, respectively.

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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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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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Cyanide chemistry and its effect on mineral flotation

The mechanisms underlying the depression effect on pyrite flotation may be attributed to the formation of insoluble hydrophilic iron cyanide compounds on mineral surfaces, preventing the chemisorption of xanthate. ... The technologies using various physical, chemical, and biological methods or a combination thereof to detoxify and utilize ...

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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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The depression of copper-activated pyrite in flotation by …

The depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different biopolymers, modified from lignosulfonate, were examined to depress the flotation of copper-activated pyrite. ... (2014) found that the three biopolymers differing in molecular weight and polymer chemistry ...

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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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