An investigation into the selective separation and adsorption mechanism of a macromolecular depressant in the galena-chalcopyrite system

Zhang, Xingrong; Zhu, Yimin; Zheng, Guibing; Han, Lupeng; McFadzean, B.; Qian, Zhibo; Piao, Yongchao; O’Connor, C.T.

doi:10.1016/j.mineng.2019.02.004

Cited by 46 publications

(4 citation statements)

References 43 publications

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“…Galena and sphalerite are the main sources of Pb and Zn extracted by these industries and often coexists in nature [3,4]. Galena is naturally hydrophobic, making it suitable for flotation separation [5][6][7][8][9][10]. The floatability of sphalerite, on the other hand, depends on its impurities, particularly the iron content.…”

Section: Introductionmentioning

confidence: 99%

Effects of seawater on the adsorption of xanthate onto galena and sphalerite

Song,

Yao,

Yin

2024

J. Phys.: Conf. Ser.

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Seawater contains divalent calcium and magnesium cations. Under alkaline conditions, calcium and magnesium ions react with hydroxide ions to form insoluble hydroxyl complexes or hydroxide precipitates. The hydrophilic substances that may be adsorbed on the mineral surface during the flotation process hinder the adsorption of the collector, affecting mineral hydrophobicity, and thus reducing the floatability of the mineral. In this study, the effects of seawater on the adsorption of xanthate onto galena and sphalerite were investigated. The results show that under strong alkaline conditions, seawater has significant and slight adverse effects on sphalerite and galena, respectively. Flotation regulators such as ethylenediamine tetraacetic acid, sodium hexametaphosphate, and sodium silicate can eliminate the adverse effect on galena and sphalerite flotation to a certain extent. The mechanisms were revealed through microflotation experiments, contact angle measurements, bubble-particle attachment tests, zeta potential measurements, and XPS analysis.

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Section: Introductionmentioning

confidence: 99%

Effects of seawater on the adsorption of xanthate onto galena and sphalerite

Song,

Yao,

Yin

2024

J. Phys.: Conf. Ser.

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“…2007); (3) the minerals are oxidized and hydrated in water, resulting in the weakening and destruction of the internal bonds of the mineral lattice, and the interference of dissolved surface ions and the inherent ions in water on flotation (October. 2020;Zhang et al 2019); (4) the inhibition effect of existing conventional inhibitors is weak, and it is difficult to expand the floatability difference between chalcopyrite and galena (Patra and Natarajan. 2008;Liu et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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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“…However, mostly sulfide ores are recovered by flotation [22][23][24][25][26][27][28]. e flotation depressing behavior and adsorption mechanism of galena have been investigated by a series of experiments; the results showed that macromolecular polymer polyacrylamideallylthiourea (PAM-ATU) was an effective depressant for galena in separation from chalcopyrite [29]. Flotation research on galena indicated that higher flotation recovery was achieved under the conditions of straight chain xanthates as collector and methyl isobutyl carbinol as frother [30].…”

Section: Introductionmentioning

confidence: 99%

Multianalysis Characterization of Mineralogical Properties of Copper‐Lead‐Zinc Mixed Ores and Implications for Comprehensive Recovery

Zhang

Wen

Feng

et al. 2020

Advances in Materials Science and Engineering

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Copper-lead-zinc mixed ore in Tibet, China, is a complex and refractory polymetallic ore resource; thus, ascertaining its mineralogical properties is very important for comprehensive recovery of valuable elements. In this work, the mineralogical properties of this copper-lead-zinc mixed ore have been characterized in detail following a multidisciplinary approach, including chemical, phase, x-ray diffraction (XRD), electron microprobe, and mineral liberation analyses. The results show that the raw ore contained 0.53% Cu, 1.29% Pb, and 0.54% Zn; the oxidation rates of copper, lead, and zinc were 40.21%, 79.31%, and 84.83%, respectively. The Au and Ag contents in the raw ore were 0.28 g/t and 23.6 g/t, which can be comprehensively utilized along with the recovery of copper, lead, and zinc. The gangue mainly contained SiO2, CaO, and Al2O3. Copper in the raw ore mainly existed in bornite, duftite, chalcopyrite, and chrysocolla; lead mainly existed in cerussite, duftite, and galena; zinc mainly existed in willemite, hemimorphite, and sphalerite. The complexity in the embedding and wrapping relationships, fine-grained dissemination, high oxidation, and considerable differences in the floatability of various minerals result in difficulties in recovering the target minerals using a single method. Based on the systematic mineralogical properties obtained, an integrated technology of “bulk flotation-oxidation roasting-hydrometallurgy” has been proposed to enrich and separate copper, lead, and zinc in the ore, providing new ideas for the comprehensive and efficient utilization of polymetallic mineral resources in Tibet.

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An investigation into the selective separation and adsorption mechanism of a macromolecular depressant in the galena-chalcopyrite system

Cited by 46 publications

References 43 publications

Effects of seawater on the adsorption of xanthate onto galena and sphalerite

Effects of seawater on the adsorption of xanthate onto galena and sphalerite

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

Multianalysis Characterization of Mineralogical Properties of Copper‐Lead‐Zinc Mixed Ores and Implications for Comprehensive Recovery

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