Collectorless flotation of oxidized pyrite

Özün, Savaş; Hassas, Behzad Vaziri; Miller, Jan D.

doi:10.1016/j.colsurfa.2018.10.064

Cited by 37 publications

(16 citation statements)

References 39 publications

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“…However, the two peaks centered at 931.97 and 951.57 eV correspond to the Cu 2p3/2 and Cu 2p1/2 of CuO, indicating that the surface of chalcopyrite was oxidized slightly before thermal pretreatment (Hirajima et al, 2014). The peaks of Fe2O3 and the S 2p3/2 and S 2p1/2 peaks of SO4 2-were observed at 711.44, 162.10, and 163.37 eV, respectively (Ozun et al, 2019;Siriwardane et al, 1990). According to Fig.…”

Section: Xps Analysismentioning

confidence: 90%

Selective flotation separation of chalcopyrite and sphalerite by thermal pretreatment under air atmosphere

Zhou¹,

Geng²,

Zhang³

et al. 2020

Physicochem. Probl. Miner. Process.

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Section: Xps Analysismentioning

confidence: 90%

Selective flotation separation of chalcopyrite and sphalerite by thermal pretreatment under air atmosphere

Zhou¹,

Geng²,

Zhang³

et al. 2020

Physicochem. Probl. Miner. Process.

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“…This is most probably due to the progressive removal of the secondary particles or oxide layers from the particle surfaces by the ultrasonic application leading to a better collector adsorption. This observation is in line with the previous studies where the ultrasonic application was found to result in higher recoveries at better selectivity when applied before and during flotation (Aldrich and Feng, 1999;Celik et al, 2002;Ozkan., 2006;Ozkan and Kuyumcu., 2006;Cilek and Ozgen, 2009;Kang et al;Ozkan et al, 2012;Gungoren et al, 2017;Cao et al, 2017;Ghadyani et al, 2018;Ozun et al, 2019;Gungoren et al, 2019;Chen et al, 2020). When the ultrasonic application was applied to the floated particles followed by the re-flotation of these particles, the flotation behavior of the two minerals separated very sharply.…”

Section: Effect Of Ultrasonic Application For Separate Pyrite and Galmentioning

confidence: 99%

“…In sulfide ores which are significant sources of base metals (galena, chalcopyrite, sphalerite, etc. ), pyrite is usually considered to be an unwanted gangue mineral (Chandra and Gerson, 2010;Huang et al, 2013;Moslemi and Gharabaghi, 2017;Ozun et al, 2019). In sulfide-ore mining, pyrite is removed from valuable minerals by flotation (Li et al, 2012;Taguta et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…These jets can remove surface coatings from minerals, and even eliminate oxidation (Kang et al, 2009, Cao et al, 2017. Therefore, the use of the ultrasonic application has been investigated by several studies for improving flotation efficiency before flotation (Aldrich and Feng, 1999;Celik et al, 2002) or during flotation (Ozkan and Kuyumcu, 2006, Cilek and Ozgen, 2009, Ozkan et al, 2012Gungoren et al 2017;Ghadyani et al, 2018;Ozun et al, 2019). Nevertheless, a systematic study on the effects of ultrasonic application, especially for mineral mixtures, will be an important contribution to the literature.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the effects of ultrasonic energy on the flotation behavior of pyrite and galena minerals

Horasan¹,

Tanriverdi²,

Çiçek³

et al. 2020

Physicochem. Probl. Miner. Process.

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Although pyrite is one of the more abundant minerals of the earth crust, it has low economic value. When it reports to the concentrate during flotation along with the valuable minerals, it decreases the grade of the valuable minerals and leads to an increase in smelting costs. Numerous modifications have been suggested in the literature to increase the selective recovery of pyrite containing base metalsulfide ores. The use of ultrasonic applications is one such method. In this study, the effect of the ultrasonic application on the flotation behavior of galena and pyrite mineral was investigated through systematic Hallimond Tube experiments. In the initial phase of the experiments, the optimum flotation conditions (particle size, pH, amount of air, and amount of reagent) were determined for the two minerals. Subsequent experiments were carried out under these optimums to distinguish the effect of the ultrasonic application. The influence of how the ultrasonic application was applied (i.e. before and during the conditioning stage or before the re-flotation of the concentrate) was also studied. It was observed that the ultrasonic application had a strong activating influence if it was administered before or during the conditioning stage. The effect was similar to whether the minerals were floated individually or from their mixtures. However, when it was applied to a flotation concentrate before reflotation, it selectively displayed a depressant action for the pyrite to the extent that no depressants were needed. The results conclusively showed that the ultrasonic application could drastically improve the selectivity of the complex ores.

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“…Thus, sulfide minerals having fresh and less oxidized surfaces show natural floatability and readily float without a collector. 4,5 The natural floatability of sulfide minerals under appropriate conditions has been reported in the descending order as chalcopyrite > galena > pyrrhotite > sphalerite > pyrite > arsenopyrite. 6,7 However, the hydrophobic behavior of their surfaces, and thus the flotation recovery responses in the presence/absence of xanthates, decreases with surface oxidation.…”

Section: Introductionmentioning

confidence: 99%

Determination of Optimum Parameters for Flotation of Galena: Effect of Chain Length and Chain Structure of Xanthates on Flotation Recovery

Özün

Ergen

2019

ACS Omega

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The structure of the xanthates’ hydrocarbon (C–H) chain is one of the major factors which affect flotation recovery. The effectiveness and the collecting power of xanthates increase with increasing chain length and vary depending on the chain structure: branched and straight chains. In this regard, the influences of length (2–5 carbon) and structure (straight: normal and branched: iso) of xanthate’s hydrocarbon chain on flotation recovery of galena were investigated under different experimental conditions: xanthate concentration, conditioning time, air flow rate (AFR), and air bubble size. Because of the steric effects of the chain structure, the branched chain xanthates gave lower flotation recoveries with shorter conditioning times compared to those with straight chain xanthates. Over-conditioning with straight chain xanthates resulted in hydrophobic aggregation of galena particles which resulted in the detachment of galena particles from air bubbles due to increasing weight, leading to lower flotation recoveries. In the case of flotation with different AFRs, the flotation recoveries increased with increasing AFR to 7 lph and further increase in AFR (10 lph) negatively affected the flotation recoveries when particles had insufficient hydrophobic surfaces. The maximum flotation recoveries were obtained with the addition of MIBC (methyl isobutyl carbinol) as a frother; the size of the air bubbles deceased with increasing MIBC concentration which increased higher encounter/collision probability of air bubbles with galena particles, resulting in higher flotation recoveries.

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Collectorless flotation of oxidized pyrite

Cited by 37 publications

References 39 publications

Selective flotation separation of chalcopyrite and sphalerite by thermal pretreatment under air atmosphere

Selective flotation separation of chalcopyrite and sphalerite by thermal pretreatment under air atmosphere

Investigating the effects of ultrasonic energy on the flotation behavior of pyrite and galena minerals

Determination of Optimum Parameters for Flotation of Galena: Effect of Chain Length and Chain Structure of Xanthates on Flotation Recovery

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