Selective flotation of chalcopyrite and molybdenite using H2O2 oxidation method with the addition of ferrous sulfate

Suyantara, Gde Pandhe Wisnu; Hirajima, Tsuyoshi; Miki, Hajime; Sasaki, Keiko; Yamane, Masashi; Takida, Eri; Kuroiwa, Shigeto; Imaizumi, Yuji

doi:10.1016/j.mineng.2018.02.005

Cited by 66 publications

(29 citation statements)

References 56 publications

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“…The peak located at 533.5 eV is assigned to the adsorption of oxygen on the molybdenite surface (O2/MoS2) [45]. The peak at 532.1 eV that corresponds to the oxide of the molybdenum species shifted to 532.0 eV after H2O2 treatment, supporting the low surface oxidation of molybdenite [11]. The oxidation products are observed in O 1s spectra rather than Mo 3d spectra, which may be due to the dissolution of molybdenum oxides during H2O2 treatment.…”

Section: Xps Analysismentioning

confidence: 84%

“…Freshly ground molybdenite and freshly prepared synthetic bismuthinite were used for X-ray photoelectron spectroscopy (XPS) samples. The experimental procedure was performed as previously described [11,19]. The XPS results of the treated and untreated samples were obtained with a K-Alpha 1063 spectrometer (Thermo Scientific Co., Waltham, MA, USA) at ambient temperature.…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 99%

“…Their use is under increasing pressure due to increasingly rigid environmental pollution control regulations [9]. These inorganic depressants cannot lower the mechanical entrainment of the depressed minerals and require large dosages in the mineral industry [10,11]. As an alternative, polysaccharides have been developed and utilized in sulfide mineral separations.…”

Section: Introductionmentioning

confidence: 99%

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Effect of H2O2 on the Separation of Mo-Bi-Containing Ore by Flotation

Lin

Sun

et al. 2018

Minerals

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Hydrogen peroxide (H2O2) is a strong oxidizer that causes non-selective oxidation of sulfide minerals, and its influence on bismuth sulfide ores is not well-documented. In this study, H2O2 was proposed as an alternative bismuthinite depressant, and its effect on a Mo-Bi-containing ore was intensively investigated by batch flotation tests. Results showed that the addition of H2O2 significantly destabilized the froth phase, thus decreasing the solids and water recovery. The recovery of bismuth in molybdenum concentrate was dramatically decreased to 4.64% by H2O2 compared with that in the absence of H2O2 (i.e., 50.14%). The modified first-order kinetic model demonstrated that the flotation rate of molybdenite slightly declined after H2O2 addition, whereas that of bismuthinite was drastically reduced from 0.30 min−1 to 0.08 min−1 under the same condition. Simulation revealed that H2O2 affected the floatability of both molybdenite and bismuthinite but resulted in more detrimental effect to bismuthinite. Hence, H2O2 has the potential to act as an effective depressant in bismuth sulfide ore flotation.

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Section: Xps Analysismentioning

confidence: 84%

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of H2O2 on the Separation of Mo-Bi-Containing Ore by Flotation

Lin

Sun

et al. 2018

Minerals

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“…The S2p spectrum of sulfidization for 8 min is composed of five doublets S 2p3/2 peaks at 161.2 eV from S 2− , 161.85 eV from S 2 2− , 163.71 eV from S n 2− , 166.4 eV from SO 3 2− and 168.14 eV from SO 4 2− , respectively. (Khmeleva et al, 2005(Khmeleva et al, , 2010Smart et al, 2015;Hirajima et al, 2017;Suyantara et al, 2018). Table 3 shows the S-species concentrations of the smithsonite samples sulfidization for 4 and 8 min.…”

Section: Xps Analysismentioning

confidence: 99%

Study on Sulfide Layer Attenuation Behavior of Smithsonite During Sulfidization Flotation

et al. 2020

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The S content on the surface of smithsonite plays a decisive role in smithsonite flotation. In this study, the attenuation behavior of smithsonite surface sulfide layer was investigated by inductive coupling plasma mass-spectrometric (ICP-MS) and X-ray photoelectron spectroscopic (XPS). The results of smithsonite surface S adsorption capacity tests indicated that smithsonite surface sulfide layer is not stable, and the S adsorption capacity decreased from 22.12 × 10 −7 to 20.52 × 10 −7 mol/g from 6 to 8 min with a decrease of 7.2%. NH 4 Cl can enhance the stability of S adsorption on the smithsonite surface. After adding NH 4 Cl, the S adsorption capacity on smithsonite surface for sulfidization 8 min was increased by 10.9%. However, the S falling off capacity tests showed that the S-species will fall off from smithsonite surface under mechanical stirring. The largest amount of falling off capacity is 3.701 × 10 −7 mol/g, with a decreased percentage of 16.7%. XPS analysis indicated that monosulfide, disulfide, polysulph, sulphite, and sulfate are all the sources of the S-species falling off from the surface, and the relative content of disulfide on smithsonite surface has the greatest decreasing, reaching 0.33%. Mechanical stirring is an important reason for sulfide layer attenuation of smithsonite surface. Monosulfide, disulfide, and polysulph on smithsonite surface can be converted into soluble sulphite and soluble sulfate, resulting in the decrease of S content on smithsonite surface.

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“…However, the characteristics of high dosage and toxicity of inorganic inhibitors adversely affect the surrounding environment. Therefore, the development and application of more environment-friendly and cost-efficient inhibitors are crucial (Yin et al, 2017;Suyantara et al, 2018;Yuan et al, 2019a,b).…”

Section: Introductionmentioning

confidence: 99%

Effects of Sodium Alginate on the Flotation Separation of Molybdenite From Chalcopyrite Using Kerosene as Collector

Zeng

Zhang

et al. 2020

Front. Chem.

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In this paper, the effect of sodium alginate (SA) on the flotation separation of molybdenite (MoS 2) from chalcopyrite using kerosene as collector was systematically investigated. The results of single-mineral micro-flotation tests indicated that SA exhibited strong depression on chalcopyrite flotation while it imposed no impact on the floatability of molybdenite. However, in the chalcopyrite-molybdenite mixed-mineral flotation system, the presence of chalcopyrite significantly increased the depressing effect of SA on molybdenite flotation, leading to a considerable reduction in the flotation selectivity. The negative impact of chalcopyrite on the performance of SA in molybdenite flotation was eliminated by adding a certain dosage of kerosene prior to SA. A concentrate containing 53.43% of molybdenum (Mo) was obtained at 76.90% of recovery using 19 mg/L kerosene and 40 mg/L SA at pH 5.4. Zeta potential measurements indicated that the adsorption of SA on chalcopyrite surfaces was stronger than that on molybdenite surfaces, which agreed with the single-mineral flotation test results. The adsorption of SA on chalcopyrite was further confirmed to be chemisorption by Fourier-transform infrared spectroscopy (FTIR) spectra analyses. When Cu 2+ appeared in solution, the flotation of molybdenite was strongly depressed by SA. Mechanism analyses indicated that more active sites were generated on molybdenite surfaces after the addition of Cu 2+ , thus promoting the adsorption of SA.

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Selective flotation of chalcopyrite and molybdenite using H2O2 oxidation method with the addition of ferrous sulfate

Cited by 66 publications

References 56 publications

Effect of H2O2 on the Separation of Mo-Bi-Containing Ore by Flotation

Effect of H2O2 on the Separation of Mo-Bi-Containing Ore by Flotation

Study on Sulfide Layer Attenuation Behavior of Smithsonite During Sulfidization Flotation

Effects of Sodium Alginate on the Flotation Separation of Molybdenite From Chalcopyrite Using Kerosene as Collector

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