Electrochemical characteristics and collectorless flotation behavior of galena: With and without the presence of pyrite

Qin, Wenqing; Wang, Xingjie; Ma, Liyuan; Jiao, Fen; Liu, Ruizeng; Yang, Congren; Gao, Ke

doi:10.1016/j.mineng.2015.01.010

Cited by 51 publications

(18 citation statements)

References 18 publications

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“…The flotation recoveries of that of galena. 30 Nanobubbles could remarkably increase the floatability of precipitated particles as found in the comparison between solutions C and D in flotation recoveries of precipitated particles, which complied with previous research. 26,27,31,32 They found that the major role played by nanobubbles was to make fine particle flocculation.…”

Section: ■ Resultssupporting

confidence: 91%

The Role of Nanobubbles in the Precipitation and Recovery of Organic-Phosphine-Containing Beneficiation Wastewater

Xiao

Quan

et al. 2018

Langmuir

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Dissolved air flotation (DAF) is broadly applied in wastewater treatment, especially for the recovery of organic pollution with low concentration. However, the mechanism of interaction between nanoscale gas bubbles and nanoparticles in the process of DAF remains unclear. Here, we investigated the role of nanobubbles in the precipitation of styryl phosphoric acid (SPA)-Pb particles and recovering organic phosphine containined in beneficiation wastewater by UV-vis (ultraviolet-visible) spectra, microflotation tests, nanoparticle tracking analysis, dynamic light scattering, and atomic force microscopy measurements. As suggested from the results, nanobubbles can inhibit the crystallization of SPA-Pb precipitation, which makes the sediment flotation recovery below 20%. After the precipitation crystallization is completed, nanobubbles can flocculate precipitated particles, which can promote the flotation recovery of precipitated particles to 90%. On the basis of the results, we proposed a model to explain the different roles of nanobubbles in the process of precipitation and flotation of SPA-Pb particles. This study will be helpful to understand the interaction between nanobubbles and nanoparticles in the application of flotation.

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Section: ■ Resultssupporting

confidence: 91%

The Role of Nanobubbles in the Precipitation and Recovery of Organic-Phosphine-Containing Beneficiation Wastewater

Xiao

Quan

et al. 2018

Langmuir

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“…Wenqing (Qin et al, 2015;Aikawa et al, 2020;Wang et al, 2020) reported that Pb 2+ ions are caused by the galvanic interaction that exists between galena and pyrite, which can produce Pb 2+ ions in the form of hydroxides by the electrochemical interaction as shown in Fig. 6.…”

Section: Fig 4 Consumption Of Nacn In the Processmentioning

confidence: 99%

Study of process water effect on the activation of sphalerite during differential flotation of Pb-Cu-Zn

Pérez¹,

Vázquez²,

Madrid³

et al. 2022

Physicochem. Probl. Miner. Process.

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This work was aimed to analyze the effect of concentration of Cu 2+ and Pb 2+ ions in flotation process water with sphalerite activation, the analysis was performed at Cozamin Mining flotation circuit. This analysis demonstrated that (i) it was possible to determine the relationship between Sodium Cyanide and Ammonium Bisulfite used as depressants and Cu 2+ and Pb 2+ contents in the process water. (ii) It also proved the relationship between lead and iron content in the head with the Pb 2+ ions in process water. According to the data gathered and analysis performed, (iii) it was also determined that it was possible to reuse process water as long as the use of Ammonium Bisulfite was reduced and recommended replacing the use of Sodium Cyanide with Zinc Sulfate (ZnSO4) as a depressant of Sphalerite. Additionally, the concentration of Cu 2+ and Pb 2+ ions in the water should be controlled in a range of 10 to 20 ppm and 0.10 to 0.20 ppm, respectively.

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“…A traditional three-electrode system consisting of a working electrode, counter electrode (platinum electrode with an area of 1.0 cm 2 ), and reference electrode (Ag/AgCl electrode, 3.0 mol/L KCl) was used. The pyrite electrode was cut from a highly mineralized specimen with a working area of 1.0 cm 2 as described by Qin (Qin et al, 2015b). Due to the low conductivity of sphalerite, a sphalerite CPE (carbon paste electrode) was used in this study.…”

Section: Voltammetry Measurementmentioning

confidence: 99%

Insight into the effect of galvanic interactions between sulfide minerals on the floatability and surface characteristics of pyrite

Yang¹,

Xiong²,

Xie³

et al. 2021

Physicochem. Probl. Miner. Process.

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Complex sulfide ores are usually found as a mixture of various sulfide and gangue minerals, and froth flotation is the predominant method for the selective separation of sulfide minerals. Adherence and contact between sulfide minerals are inevitable during froth flotation, and galvanic interactions between sulfide minerals will occur because of differences in rest potentials. However, the effect of these galvanic interactions on the selective flotation of sulfide minerals have been rarely studied. In this work, the effect of the galvanic interaction between pyrite and sphalerite on the flotation behavior and surface characteristics of pyrite was investigated by micro-flotation tests, collector adsorption tests, electrochemical techniques and XPS (X-ray photoelectron spectroscopy) surface analysis. The micro-flotation tests indicated that the floatability of pyrite decreased in the pH range of 4.0 to 9.5 and increased under strongly alkaline pH conditions (pH > 10) due to the galvanic interaction. The collector adsorption results demonstrated that the adsorption capacity of the collector on the pyrite surface was significantly reduced because of the galvanic interaction between pyrite and sphalerite. The electrochemical measurements revealed that the decrease in the oxidation current of xanthates to dixanthogen was responsible for the decreasing adsorption capacity of the collector on the pyrite surface. The XPS results indicated that the formation of the S " O $ "% oxidation product on the pyrite surface decreased at a strongly alkaline pH due to the galvanic interaction. Therefore, pyrite floatability improved at an alkaline pH. These results consistently showed that the galvanic interaction between pyrite and sphalerite had an important influence on the floatability and surface characteristics of pyrite.

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Electrochemical characteristics and collectorless flotation behavior of galena: With and without the presence of pyrite

Cited by 51 publications

References 18 publications

The Role of Nanobubbles in the Precipitation and Recovery of Organic-Phosphine-Containing Beneficiation Wastewater

The Role of Nanobubbles in the Precipitation and Recovery of Organic-Phosphine-Containing Beneficiation Wastewater

Study of process water effect on the activation of sphalerite during differential flotation of Pb-Cu-Zn

Insight into the effect of galvanic interactions between sulfide minerals on the floatability and surface characteristics of pyrite

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