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Keywords: seawater flotation; pyrite depression; guar gum; FBRM. 1. Introduction Pyrite is the most abundant iron sulfide mineral, and it is commonly associated as a gangue with ores of base metals such as chalcopyrite, galena, sphalerite, etc. Its …
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The pyrite and arsenopyrite model mineral samples used in this study were obtained from GeoDiscoveries Australia. The chemical composition of the minerals using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) is shown in Table 1.XRD analysis of the as …
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The effect of sulphite ions on the xanthate-induced flotation of copper-activated pyrite has been studied. Various techniques have been used to identify the plausible mechanisms of interaction of sulphite with both collector and pyrite surface. It was f ound that sulphite depressed the xanthateinduced flotation of copper-activated pyrite with nitrogen or air …
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In this study, the selective depression of arsenopyrite in pyrite flotation with in-situ generated nanoparticles was studied. Scanning electron microscope and energy dispersive X-ray spectroscopy (SEM/EDS) detection, solution chemistry analysis, fourier transform infrared spectroscopy (FTIR), adsorption tests and contact angle …
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The origin and chemistry, organic depressant-gangue minerals interaction mechanism, and the use of organic depressants in the most common chalcopyrite-flotation instances, including chalcopyrite ...
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Effect of pH on the flotation behavior. Previous studies have demonstrated that the slurry pH is a vital factor for pyrite and chalcopyrite flotation (Zhang et al. 2023b).Here, the influence of pH on the depressing capacities of KMnO 4 (3 min of treatment) for pyrite and chalcopyrite were determined by flotation tests in the pH …
DetailsPulp chemistry measurements and electrochemistry studies on tri-phase galvanic systems indicated that the strong pyrite flotation at pH 10.5 in the case of 25% pyrite feed grade was mainly due to the strong chalcopyrite surface activity and surface oxidation producing a high amount of copper ions available to activate pyrite, while the limited ...
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In this study, the selective depression of arsenopyrite in pyrite flotation with in-situ generated nanoparticles was studied. Scanning electron microscope and energy dispersive X-ray spectroscopy (SEM/EDS) detection, solution chemistry analysis, fourier transform infrared spectroscopy (FTIR), adsorption tests and contact angle measurement …
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The depression of pyrite in marmatite flotation by sodium glycerine-xanthate (SGX) was investigated through microflotation, zeta potential and adsorption measurements. The flotation tests of mineral show that in the presence of SGX, marmatite can be activated by Cu 2+ and shows good flotability, while pyrite cannot be activated …
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Cyanide is a highly effective depressant for sulfide flotation, A c c e p t e d M a n u s c r i p t N o t C o p y e d i t e d such as pyrite, chalcopyrite, and sphalerite flotation [25]. Cyanide ...
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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. ... The chemical adsorption of NaHA on pyrite was mainly through its carboxyl groups and Ca atoms on ...
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Flotation tests were conducted in a micro flotation cell with a volume of a 1.0 L XFD. Prior to flotation, a 500 g pyrite ore sample was placed in the flotation cell and depressed by lime, activator and collector for 9 min. The flotation time was 5 min. 3. Results and discussion3.1. Activation flotation of lime-depressed pyrite ore
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The selective depression of pyrite from the Kentucky No. 9 coal seam was systematically examined using various kinds of inorganic and organic chemicals. Most of the organic chemicals tested showed little selectivity in pyrite depression. It was found that both orthophosphate and pyrophosphate were effective for the selective depression of …
DetailsThe results of single mineral flotation tests showed that konjac glucomannan had a stronger depression effect on pyrite than traditional organic depressants (Starch, Dextrin, Guar gum) with the ...
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The conditioning time of each chemical modification of the pulp was 4 min and, the flotation test began by taking samples of the concentrate at 0.5, 1, 2, 4, 6, 8, and, 10 min of flotation. ... The flotation tests—pyrite depression were carried out at a pulp potential of around + 300 mV, and this is an oxidizing potential which causes the ...
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In this study, polymers are used as an alternative method for the depression of pyrite. Low molecular weight PAM polymers are used to separate copper-activated sphalerite from pyrite in the presence of isobutyl xanthate. The effects of carboxyl, sulfonate, hydroxyl or thiourea functional groups attached to the polymers on the …
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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 …
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Abstract The adsorption of both dextrin and xanthate ions at the pyrite/aqueous solution and the galena/aqueous solution interfaces have been studied through batch adsorption tests. Batch flotation tests were also carried out on a chalcopyrite ore and a chalcopyrite-galena scavenger concentrate using dextrin. Dextrin adsorption …
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Abstract Flotation of pyrite is examined as function of pH and ferrous ion concentration. To explain depression of pyrite flotation in the neutral pH range and at high concentration of ferrous ions, the mechanism of physisorption of a collecting agent is used. It is experimentally determined that interaction products of xanthate and ferrous …
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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 both polymers.
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Selectively Depress Copper-Activated Pyrite in Copper Flotation at Slightly Alkaline pH. 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)….
DetailsPyrite is a common sulfide mineral associated with galena, chalcopyrite, and sphalerite. In the selective flotation of Pb-Zn sulfide ores, pyrite is usually depressed at alkaline pH [1] [2] [3 ...
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Pyrite, as a disturbing gangue mineral in the beneficiation of valuable sulfide minerals and coal resources, is usually required to be depressed for floating in flotation practice.
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Chemical analyses and mineralogical examinations showed that these pyrite samples have different impurities and structural properties. The flotation characteristics of pyrites using ethyl xanthate ...
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The single mineral flotation tests show that both pyrite and galena were depressed by chitosan in acidic solutions to some degree. However, in the mineral mixture flotation, galena was floated with a recovery of 68% at pH 4 and pyrite was depressed with a recovery of 23%. The flotation results indicated that competitive adsorption of chitosan ...
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It has been found that moderately oxidizing conditions are favorable for collector-less flotation of pyrite while strongly reducing or oxidizing potentials lead to its depression. Increasing the ...
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Abstract The role of dextrin in the xanthate flotation of pyrite and sphalerite was examined by means of flotation tests and microelectrophoretic measurements. Floatability and ζ-potential of both minerals were found to be depressed in a suitable pH range due to the formation of their respective superficial metal hydroxide layers. The …
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The depression of pyrite in copper ore flotation is a challenge in high salinity water although natural pyrite can be depressed readily at alkaline pH due to the formation of iron hydroxides on pyrite surfaces (Boulton et al., 2001, Mu et al., 2016). In copper ore flotation, a galvanic interaction occurs between copper minerals and pyrite …
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The results of single mineral flotation tests showed that konjac glucomannan had a stronger depression effect on pyrite than traditional organic depressants (Starch, Dextrin, Guar gum) with the ...
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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 flotation results showed that coarser serpentine possessed a weaker depression effect on the pyrite flotation process, and the use of KAl(SO4)2·12H2O could efficiently limit the detrimental ...
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DOI: 10.1016/J.MINENG.2019.105921 Corpus ID: 202072143; The role of sodium metabisulphite in depressing pyrite in chalcopyrite flotation using saline water @article{Mu2019TheRO, title={The role of sodium metabisulphite in depressing pyrite in chalcopyrite flotation using saline water}, author={Yufan Mu and Yongjun Peng}, …
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It is also observed that the depression of pyrite flotation may also occur at a potential higher than the xanthate/dixanthogen equilibrium potential as a result of low cyanide concentration addition such as 10 mg/L NaCN (Hodgkinson et al., 1994, Wet et al., 1997). Therefore, it is valuable to investigate the oxidation of xanthate to dixanthogen ...
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The authors have carried out molecular modeling of clusters of simple structure and ring structure pyrite. It is suggested to analyze bonding of a collecting agent and cluster atoms using the collector capacity forecasting index. It is shown that butyl dixanthate more vigorously connects to cluster atoms than thionocarbamates, e.g., Z 200 …
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