Furthermore, the results of real ore experiments as shown in Table S4 also prove that it is more conducive to the separation of chalcopyrite from pyrite under high alkaline conditions. The previous research results reported by Wu et al. [36] also suggested that high alkaline conditions are conducive to the separation of chalcopyrite and pyrite.Web
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The results showed that the raw ore for PyC has an iron grade of 56.47%, and after SMR-magnetic separation, magnetic concentrate with an iron grade of 63.24% and an iron recovery of 95.05% could be achieved under conditions of a roasting temperature of 480°C, a reductant concentration of 30% (CO: H 2 = 1:3), a roasting time of 20min, 1200Oe ...Web
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The effects of H 2 O 2 on the flotation separation of chalcopyrite and pyrite in seawater were investigated. Pyrite was more significantly oxidized by 0.05 vol% H 2 O 2 in seawater at pH 8, as compared to that of chalcopyrite. Under optimized condition, a recovery difference of greater than 70% was obtained for chalcopyrite and pyrite.Web
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Selective separation of pyrite and galena using 2-mercaptobenzimidazole (MBI) as a chelating collector, was investigated by flotation, scanning electron microscope (SEM), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations. ... MBO and MBI to pyrite ore, which …Web
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The chamber product is also sent further to the selective separation of sphalerite first and of pyrite then. The major challenge is producing of high quality concentrates with high recovery. ... Development of the enrichment technology of difficult to enrich polymetallic pyrite ore of Korbalikhinskoye deposit. Mining J 11:78–83. Google …Web
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Galena–Pyrite Separation. Based on the previous studies, lime and calcium hypochlorite are good depressants for pyrite flotation . These reagents were applied individually in this research for the selective separation of galena from pyrite, and the results are displayed in Fig. 3a, b. Results show that both depressants could inhibit the …Web
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This separation is difficult due to the oxidation and dissolution of chalcopyrite and subsequent activation of copper on the pyrite surface [120,121]. The main problem in separating chalcopyrite from pyrite is related to the selectivity of the collectors, a product of accidental activation caused by Cu 2+ ions, which dissolve from the valuable ...Web
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Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO 3 - ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to the arsenopyrite. On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate …Web
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Flotation separation of chalcopyrite/pyrite mixtures under Mg(OH) 2 depression effectively limits pyrite entrainment into Cu concentrates. However, the Cu concentrate is still negatively affected by the low selectivity of depression by Mg(OH) 2 and unavoidable floatability activation of pyrite by surface Cu contamination via galvanic …Web
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The essence is to enhance the hydrophilicity of the pyrite surface with the help of various depressants, thereby preventing the floating of pyrite to achieve its separation from valuable minerals ...Web
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The value mineral in the ore is mainly pyrite and the dominant gangue mineral is pyrophyllite [1, 2]. Froth flotation, a physico-chemical separation process that utilizes the difference in surface properties of the valuable minerals and the gangue minerals, is the main technique to recover pyrite from pyrophyllite and other gangue …Web
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The effect of surface potential regulation on the flotation separation of pyrite and serpentine was investigated by a flotation test of artificial mixed ore, as shown in Figure 8. In Figure 8 a, we can see that …Web
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Abstract and Figures. The study of the depression effect of non-toxic depressants on the flotation separation of chalcopyrite from galena is of great importance for both industrial applications ...Web
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The approach in the current work is to facilitate the oxidation and separation of easily oxidised pyrite types as opposed to the N 2 TEC process which prevents separation of ... in Fig. 3 revealed two important properties for the five types of pyrite in the sample from Lihir of advanced argillic ore (AA ore): 1. The types of pyrite ranged from ...Web
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In pyrite ore beneficiation, As content is one of the important indicators of pyrite concentrate and must be strictly controlled (Chen et al., 2019). For Au-bearing arsenopyrite-pyrite ore it also need separating arsenopyrite and pyrite to obtain respective concentrate with different Au content. ... In this study, the separation of pyrite and ...Web
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The value mineral in the ore is mainly pyrite and the dominant gangue mineral is pyrophyllite [1,2]. Froth flotation, a physico-chemical separation process that utilizes the difference in surface properties of the valuable minerals and the gangue minerals, is the main technique to recover pyrite from pyrophyllite and other gangue …Web
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This step enhances the liberation of pyrite from the surrounding rock matrix, facilitating subsequent separation. Separation: To isolate pyrite from other minerals present in the ore, various separation techniques are employed. Froth flotation, magnetic separation, and gravity separation are common methods used to concentrate pyrite.Web
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One of the most traditional flotation processes is the separation of pyrite (which has to be depressed) from chalcopyrite. In this system, pyrite that possesses …Web
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Pyrite (FeS 2, iron disulphide) is the most abundant sulphide gangue mineral that is closely associated with copper sulphide ore deposits. The presence of pyrite increases the iron and sulphur content and dilutes the grade of copper concentrates. Practically, the froth flotation is widely used pre-treatment method for the upgradation of …Web
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Pyrite is separated from other minerals mainly by flotation. However, the hydrophilicity of pyrite is affected by many factors, causing it to easily enter the …Web
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Moreover, selective separation of sphalerite and pyrite was investigated in the absence and presence of A. ferrooxidans and NaCN ... A. ferrooxidans can depress pyrite and thus selectively separate galena and sphalerite from low-grade lead–zinc ore with high pyrite content (Mehrabani et al., 2011; Mehrabani et al., 2010), or chalcopyrite …Web
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The selective separation of sphalerite and pyrite is the final step in their recoveries. Only the efficient separation of sphalerite and pyrite can the two mineral resources of sphalerite and pyrite be sufficiently utilized. Quicklime (CaO) is the most economical and commonly used depressant for pyrite flotation [[18], [19], [20]].Web
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The separation of chalcopyrite and pyite is not fully solved, and thus more efficient depressants are still needed in industry. This paper used potassium permanganate (KMnO4) as a pyrite depressant to separate pyrite from chalcopyrite. Flotation and contact angle results indicated that pyrite could be depressed by KMnO4 at pH 7, while KMnO4 …Web
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Separation effects of sodium polyacrylate (PAAS) and gum Arabic (GA) on flotation of chalcopyrite and magnesium silicate minerals using potassium butyl xanthate (PBX) as collector were ...Web
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ABSTRACT. Four oxidants, NaClO, KMnO 4, K 2 Cr 2 O 7, and H 2 O 2, were used to promote the flotation separation of pyrite (FeS 2) from arsenopyrite (FeAsS). Ore flotation results indicate that H 2 O 2 has the …Web
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Therefore, it is very important to remove talc from sulfide ore through flotation. Pyrite (FeS 2), which is always associated with base metals, is the most common sulfide mineral (Mu et al., 2016). However, separation of pyrite and talc is very difficult because of the natural hydrophobicity of talc.Web
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Separation of chalcopyrite and pyrite in synthetic seawater. Particle size D80 of 106 µm. pH 8.5 fixed with lime and HCl. 1.5 L Agitair flotation cell. The addition of …Web
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This study aimed to investigate the suitability of sodium polyacrylate (PAAS) as a pyrite depressant in a Cu-S separation system through flotation and adsorption experiments.Web
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Separation of sphalerite through copper activation becomes problematical when other minerals within the pulp are inadvertently activated along with the sphalerite. Pyrite (FeS 2) is one such mineral that responds to copper activation and can be floated together with sphalerite [2]. Being the most abundant sulfide mineral pyrite is undesirably ...Web
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In this paper, flotation separation of chalcopyrite and pyrite via Fenton oxidation modification in a low alkaline acid mine drainage (AMD) system was …Web
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However, HG-HIMC was mostly applied (at a laboratory scale) in the removal or separation of pyrite minerals from coal fines; it was found inefficient regardless. 38,44,76,77,82,83 ... and B.C Mukherjee, …Web
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Separation: To isolate pyrite from other minerals present in the ore, various separation techniques are employed. Froth flotation, magnetic separation, and gravity separation are common methods used to concentrate pyrite. These techniques exploit …Web
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In this study, to eliminate the adverse effect of serpentine on the flotation of sulfide minerals, the effect of CA on the flotation separation of pyrite from serpentine was systematically investigated through flotation experiments, and the depression mechanisms were also studied through zeta potential measurements, turbidity tests, adsorption …Web
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In batch flotation tests of complex sulfide ore of Mississippi Valley type (MVT) at natural pH (7.8), a separation efficiency of 61% was achieved between galena and pyrite when Chi-g-PAM was used ...Web
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