The critical degree of bornite surface oxidation in flotation

Moimane, Tiisetso; Huai, Yangyang; Peng, Yongjun

doi:10.1016/j.mineng.2020.106445

Cited by 9 publications

(3 citation statements)

References 39 publications

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“…The peaks at 708.0 and 720.9 eV are consistent with the Fe 3+ 2p 3/2 and Fe 3+ 2p 1/2 spin–orbit doublets, respectively . The peaks located at 711.2 and 724.2 eV are assigned to FeOOH species . In addition, the higher binding energy located at 714.5 and 729.8 eV indicates the presence of iron sulfate on the surface .…”

Section: Resultsmentioning

confidence: 64%

“…19 The peaks located at 711.2 and 724.2 eV are assigned to FeOOH species. 20 In addition, the higher binding energy located at 714.5 and 729.8 eV indicates the presence of iron sulfate on the surface. 21 As shown in Figure 1g, the high-resolution S 2p peaks that appeared at 161.3 and 162.5 eV are consistent with the value of monosulfide S 2− .…”

Section: Resultsmentioning

confidence: 99%

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Unraveling the Mechanism of Chalcopyrite’s Superior Performance for Lithium Storage

Jiang

Zhao

Zhang

et al. 2021

ACS Appl. Energy Mater.

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Chalcopyrite (CuFeS 2 ), a natural copper−iron bimetallic sulfide, has shown great promise as an active material for lithium-ion batteries because of its superior electrochemical performance, high abundance, and low cost. However, its reaction mechanisms are still indeterminate. Herein, we demonstrate that chalcopyrite CuFeS 2 exhibits unique phase and structure transformations during electrochemical reactions, which are highly related to its superior electrochemical performance. In situ XRD and ex situ XPS characterizations reveal that CuFeS 2 is converted into a nanoscale hybrid that contains Cu 2 S and FeS y after the initial discharge−charge cycle. The emerging heterostructure endows the electrode with structural integrity, suppressed polysulfide dissolution, and enhanced charge transfer and Li-ion diffusion during reactions. In consequence, CuFeS 2 exhibits excellent lithium-storage performance with a high specific capacity of 990 mAh g −1 after 300 cycles under the current density of 1000 mA g −1 . This work sheds light on the intrinsic electrochemical superiority of chalcopyrite CuFeS 2 and provides guidelines to understand other bimetallic sulfides.

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Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 99%

Unraveling the Mechanism of Chalcopyrite’s Superior Performance for Lithium Storage

Jiang

Zhao

Zhang

et al. 2021

ACS Appl. Energy Mater.

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“…The experimental results presented in this work suggest that PAM-molecule adsorption on enargite results from the presence of these oxidized compounds. Bornite is a mineral that readily oxidizes during grinding, which affects its surface properties, causing low recoveries in flotation [39,40]. The presence of these oxidized surface compounds explains PAM adsorption.…”

Section: Discussionmentioning

confidence: 99%

The Effect of an Anionic Polyacrylamide on the Flotation of Chalcopyrite, Enargite, and Bornite

Jimenez,

Cabrera,

Rodriguez

et al. 2024

Minerals

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Water recycling in mining is essential to decrease water usage, which results in the accumulation of high concentrations of inorganic and organic substances in the process water. Consequently, adverse impacts on the flotation process of copper sulfides may arise. High-molecular-weight polymers based on anionic polyacrylamides (PAMs) are used as tailing flocculants in mineral processing plants. The recirculation of water recovered from the tailing thickeners to the flotation process introduces residual PAMs, which can impact the flotation of important copper sulfides like chalcopyrite, bornite, and enargite. This issue has been rarely studied. In this work, results on the effect of an anionic polyacrylamide (PAM) of medium–low anionicity on the flotation of chalcopyrite, enargite, and bornite are reported and analyzed. The results show that PAM molecules depress the flotation of chalcopyrite, enargite, and bornite under a wide range of pH values. The experimental data indicate that the depressing effect of PAMs on copper sulfides increases with pH. The zeta potential results reveal that this parameter becomes less negative with the addition of PAMs, indicating interactions between PAM molecules and the surfaces of the copper sulfides. PAM adsorption on copper sulfides increases with pH, which correlates with the flotation and zeta potential data. It is proposed that the interactions between PAM molecules and copper sulfides are explained by the presence of surface iron and copper hydroxides that create chemically active adsorption sites.

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New insights into the effects of particle size on the surface modification by low-temperature plasma from a perspective of surface oxidation degree

Ran

Kong

et al. 2022

Advanced Powder Technology

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The critical degree of bornite surface oxidation in flotation

Cited by 9 publications

References 39 publications

Unraveling the Mechanism of Chalcopyrite’s Superior Performance for Lithium Storage

Unraveling the Mechanism of Chalcopyrite’s Superior Performance for Lithium Storage

The Effect of an Anionic Polyacrylamide on the Flotation of Chalcopyrite, Enargite, and Bornite

New insights into the effects of particle size on the surface modification by low-temperature plasma from a perspective of surface oxidation degree

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