Selective passivation behavior of galena surface by sulfuric acid and a novel flotation separation method for copper-lead sulfide ore without collector and inhibitor

Xie, Haiyun; Liu, Yanhao; Rao, B. Dharma; Jizong, Wu; Gao, Likun; Chen, Luzheng; Tian, Xiaosong

doi:10.1016/j.seppur.2021.118621

Cited by 47 publications

(6 citation statements)

References 41 publications

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“…The academic community believes that this is mainly due to the release of Fe ions into the system after the action of chalcopyrite and sulfuric acid. Combining the results of FT-IR and AFM analysis, we can infer that the surface of chalcopyrite forms a passivation film dominated by Cu1-xFe1-yS1-z (y≫x, y+x≈1) and the interior of chalcopyrite is protected Xie et al 2021). Therefore, after the action of sulfuric acid, the surface composition of chalcopyrite is still a highly hydrophobic copper sulfide, which still has very good floatability.…”

Section: Mechanism Analysis Of Sulfuric Acid With Galena and Chalcopy...mentioning

confidence: 84%

Effect of preoxidation on copper flotation from copper-lead mixed concentrate

Zeng¹,

Xie²,

Ye³

et al. 2023

Physicochem. Probl. Miner. Process.

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Flotation separation of galena and chalcopyrite is always a difficult problem in mineral processing. In this paper, the selective preoxidation of galena and chalcopyrite with sulfuric acid was developed, and then the two minerals were completely separated by flotation. The surface oxidation mechanism of galena and chalcopyrite with sulfuric acid was analyzed by Fourier transform infrared spectroscopy (FT-IR) and Atomic Force Microscopy (AFM), and the results showed that hydrophilic oxide film was formed on the galena surface, while the surface of chalcopyrite is still hydrophobic sulfide film, which led to the separation of the two minerals by flotation. In addition, the Response Surface Methodology (RSM) was used to analyze the influence of main preoxidation parameters on the flotation separation of copper-lead concentrate, and the parameters were further optimized, as follows: sulfuric acid concentration of 5.3 mol/L, oxidation temperature of 101.8 °C and time of 48.3 min. The mixed concentrate containing Cu 11.57% and Pb 16.75% was preoxidized under the above conditions, and the flotation separation verification results showed that Cu concentrate with Cu grade of 18.09% and recovery of 95.41%, and Pb concentrate with Pb grade of 44.96% and recovery of 95.94% was obtained respectively. This paper provides a new method of preoxidation combined flotation to achieve high-efficiency separation of copper-lead mixed concentrate.

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Section: Mechanism Analysis Of Sulfuric Acid With Galena and Chalcopy...mentioning

confidence: 84%

Effect of preoxidation on copper flotation from copper-lead mixed concentrate

Zeng¹,

Xie²,

Ye³

et al. 2023

Physicochem. Probl. Miner. Process.

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“…As observed, H 2 SO 4 leaching shows that both the leaching rates of Pb and Sn were less than 1.2 % in 3–6 mol/L H 2 SO 4 . It’s indicated that H 2 SO 4 is not suitable for metal leaching from waste Pb-Sn alloy due to the strong oxidizing property H 2 SO 4 , which can react with Pb and PbO to rapidly generate insoluble PbSO 4 passivation film [32] , [33] , [34] . As for HCl leaching, it’s found HCl has a good solubilizing capacity for Sn due to the coordination solubilization of Sn-Cl.…”

Section: Resultsmentioning

confidence: 99%

Intensifying separation of Pb and Sn from waste Pb-Sn alloy by ultrasound-assisted acid leaching: Selective dissolution and sonochemistry mechanism

Liu,

Shi,

Huang

et al. 2024

Ultrasonics Sonochemistry

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“…9. The BE of Cu 2p 3/2 from chalcopyrite was 932.51 eV (Xie et al, 2021). Another Cu 2p 3/2 peak was found at a higher BE position, i.e., 933.64 eV, due to the CuO present on the chalcopyrite surface (Khoso et al, 2019).…”

Section: Xps Analysis Of Chalcopyrite Surfacementioning

confidence: 96%

“…It was inferred that KMnO 4 could not oxidize the chalcopyrite surface e ciently to produce new surface species. Similarly, other oxidants, involving potassium ferrate, sulfuric acid and Carboxymethyl cellulose (Xie et al, 2021;Zheng et al, 2023), cannot react e ciently with chalcopyrite. It seems that pyrite rather than chalcopyrite is more readily to reacted with an oxidant.…”

Section: Zeta Potential Analysesmentioning

confidence: 99%

Flotation separation of pyrite and chalcopyrite with potassium permanganate as a depressant

Cao,

Zhang,

Yan

et al. 2023

Preprint

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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 treated chalcopyrite could be floated by sodium ethylxanthate. Zeta potential analysis revealed that KMnO4 oxidized the pyrite surface, lowering its hydrophobicity. The oxidation products on the pyrite surface were FeO, FeOOH and Fe2(SO4)3 as determined by XPS analyses. These oxidation products were well coated on the pyrite surface, which dramatically lowers the hydrophobicity of pyrite. In contrast, in the case of chalcopyrite, KMnO4 treatment did not generate new oxidation components on its surface, causing chalcopyrite surface to remain hydrophobic and allowing the flotation of chalcopyrite by air bubbles. Thus, pyrite could be efficiently separated from chalcopyrite using KMnO4 as a depressant.

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Selective passivation behavior of galena surface by sulfuric acid and a novel flotation separation method for copper-lead sulfide ore without collector and inhibitor

Cited by 47 publications

References 41 publications

Effect of preoxidation on copper flotation from copper-lead mixed concentrate

Effect of preoxidation on copper flotation from copper-lead mixed concentrate

Intensifying separation of Pb and Sn from waste Pb-Sn alloy by ultrasound-assisted acid leaching: Selective dissolution and sonochemistry mechanism

Flotation separation of pyrite and chalcopyrite with potassium permanganate as a depressant

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