Effect of surface oxidation on the depression of sphalerite by locust bean gum

Feng, Bo; Zhong, Chunhui; Zhang, Liangzhu; Guo, Yanan; Wang, Tao; Huang, Zhiqiang

doi:10.1016/j.mineng.2019.106142

Cited by 54 publications

(14 citation statements)

References 15 publications

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“…Figure 6 shows the S 2p spectra of the chalcopyrite with treatment of different flotation reagents. The XPS bands at 161.2-161.4 eV were attributed to surface monosulfide S 2− [6,[12][13][14][15]. The XPS bands at 162.4-162.8 eV were attributed to the disulfide species S 2 2− by the oxidation process of S 2− on the chalcopyrite surface [6,[12][13][14][15], and the XPS bands at 163.3-164.0 eV were the results of the polysulfide and elemental sulfur S n 2− /S 0 that were formed in the oxidation operations [6,[12][13][14][15].…”

Section: X-ray Photoelectron Spectroscopy (Xps) Resultsmentioning

confidence: 99%

“…The carboxyl group (-COOH) is hydrophilic and could form hydrophilic membrane layer, which could enhance hydrophilic property of the mineral and prevent collector adsorption on the mineral surface. It is generally accepted that the effect of flotation reagent can be changed by metal ions [5][6][7][8][9][10][11]. Copper sulphate, as an activator, has been used in industrial flotation for a long time, and is mainly used for the flotation of nonferrous sulfide [5].…”

Section: Introductionmentioning

confidence: 99%

“…Inactivated sphalerite interacts weakly with xanthate collectors. When copper sulfate activates sphalerite, the Cu ion is exchanged with the Zn ion of sphalerite, which forms the surface of copper sulfide and enhances the adsorption of collector [6]. Unlike sphalerite, inactivated pyrite responds well to xanthate collector, and the copper sulphate activation of pyrite follows a different mechanism from that of sphalerite.…”

Section: Introductionmentioning

confidence: 99%

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The Auxiliary Effect of Copper Ions on the Depressant Effect of Sodium Thioglycolate in Chalcopyrite Flotation

Zhang

Chen

et al. 2020

Minerals

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Sodium thioglycolate is a chalcopyrite depressant, but its depressant effect is weak. The paper investigated the effect of CuSO4 on the depressant performance of sodium thioglycolate towards chalcopyrite through flotation tests, Zeta potential measurements, X-ray photoelectron spectroscopy (XPS) analyses and Fourier-transform infrared (FTIR) spectra measurements. It was found that copper ions could improve the depressant effect of sodium thioglycolate on chalcopyrite. The results showed that copper ions could adsorb on the surface of chalcopyrite and form mixed copper sulfide and cupric oxides/hydroxides adsorption layers. As a result, the mineral composition on the chalcopyrite surface was changed. With sodium thioglycolate treatment, the Zeta potential and the adsorption sites of chalcopyrite surface were both increased, and the hydrophobic substance Sn2−/S0 concentration was decreased. The electrostatic repulsion of chalcopyrite surface with sodium thioglycolate was also decreased, which made the sodium thioglycolate interact with chalcopyrite more easily. The more active sites could adsorb more sodium thioglycolate, which improved the hydrophilia of chalcopyrite. At the same time, the decrease of Sn2−/S0 concentration could further improve the hydrophilia of chalcopyrite. The results show that the copper ions could exhibit auxiliary effect with sodium thioglycolate and could further enhance the depressant effect of sodium thioglycolate on the chalcopyrite flotation. This paper provides new insights into the depression of chalcopyrite flotation by sodium thioglycolate.

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Section: X-ray Photoelectron Spectroscopy (Xps) Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Auxiliary Effect of Copper Ions on the Depressant Effect of Sodium Thioglycolate in Chalcopyrite Flotation

Zhang

Chen

et al. 2020

Minerals

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“…The zeta potential measurements were carried out using a ZetaProbe instrument (Colloidal Dynamics Company, USA). In each experiment, the malachite sample was placed in a measuring cup filled with DI water, and the concentration of the sample solution was 5% (Feng et al, 2020). The pH of the solution was adjusted by adding HCl solution (2 mol/dm 3 ) and NaOH solution (2 mol/dm 3 ).…”

Section: Zeta Potential Measurementsmentioning

confidence: 99%

Effect of sulfidization on the stability of adsorption of isoamyl xanthate on malachite

Wen¹,

Deng²

2020

Physicochem. Probl. Miner. Process.

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The activity and stability of adsorbed isoamyl xanthate (IX) on a malachite surface before and after sulfidization were studied by calculating the malachite dissolved component and adsorption energy and performing experiments the zeta potential measurements, adsorption and desorption, and flotation experiments. In the malachite slurry solution, the main components of copper are Cu 2+ , CuCO3, HCuO2-, CuO2-, and Cu(CO3)2 2-, and the concentration distribution of these components was related to the slurry pH value. Between pH 5 to 9, the main copper component in the slurry was CuCO3. The malachite surface was negatively charged; however, the sulfur ions or hydrosulfide ions could still adsorb on the surface at a pH of more than 8.2, which indicated that the sulfidization of malachite corresponds to the chemical adsorption, and the surface electrical properties of the malachite were not obvious to the sulfidization. The adsorption activity of malachite on IX was stronger than that of the sulfide malachite; however, the desorption ratio of IX concerning the malachite was higher than that of the sulfide malachite. The adsorption energy of IX on the malachite and sulfide malachite surface was-449.6 kJ/mol and-1134.7 kJ/mol, respectively, and the IX adsorbed on the sulfide malachite surface was more stable. The flotation experiments indicated that the sulfidization of malachite reduced the consumption of IX; however, the recovery of malachite was improved.

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“…10 (A), (B). The spectrum of Zn 2p3/2 on the surface of fresh marmatite could be divided into two peaks located at 1021.67 eV and 1022.58 eV, designated as Zn-S and Zn-O/OH, respectively (Feng et al, 2020;Ejtemaei et al, 2017) . S 2p in pure marmatite was a typical doublet, and species at binding energy of 161.69 eV and 162.89 eV were assigned to S 2-of ZnS (Ejtemaei et al, 2017;Huang et al, 2019).…”

Section: Xps Analysismentioning

confidence: 99%

Effect of compound phosphate collector on flotation separation of jamesonite from marmatite and insights into adsorption mechanism

Huang¹,

Gu²,

Xiong³

et al. 2020

Physicochem. Probl. Miner. Process.

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Effect of surface oxidation on the depression of sphalerite by locust bean gum

Cited by 54 publications

References 15 publications

The Auxiliary Effect of Copper Ions on the Depressant Effect of Sodium Thioglycolate in Chalcopyrite Flotation

The Auxiliary Effect of Copper Ions on the Depressant Effect of Sodium Thioglycolate in Chalcopyrite Flotation

Effect of sulfidization on the stability of adsorption of isoamyl xanthate on malachite

Effect of compound phosphate collector on flotation separation of jamesonite from marmatite and insights into adsorption mechanism

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