Effect of ultrasound on bubble-particle interaction in quartz-amine flotation system

Güngören, Can; Özdemir, Orhan; Wang, Xuming; Özkan, Şehirbay

doi:10.1016/j.ultsonch.2018.12.023

Cited by 61 publications

(35 citation statements)

References 47 publications

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“…Numerous studies have shown the application of ultrasonic frequencies (>20 kHz) a.k.a ultra-sonication to mineral beneficiation especially in the interface science [1], biochemistry [2], flotation [3][4][5][6] and hydrometallurgy [7,8]. Ultrasonic (US) vibration has been used over four decades as a pre-treatment [9][10][11][12] and recently as a simultaneously applied approach [13,14] to flotation in order to improve mineral floatability with a special focus on coal industry [15][16][17][18][19]. Although its application in laboratory has been broadly studied, its fundamental aspects were not adequately reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Power Ultrasound on Wettability and Collector-Less Floatability of Chalcopyrite, Pyrite and Quartz

et al. 2021

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Numerous studies have addressed the role of ultrasonication on floatability of minerals macroscopically. However, the impact of acoustic waves on the mineral hydrophobicity and its physicochemical aspects were entirely overlooked in the literature. This paper mainly investigates the impact of ultrasonic power and its time on the wettability and floatability of chalcopyrite, pyrite and quartz. For this purpose, contact angle and collectorless microflotation tests were implemented on the ultrasonic-pretreated and non-treated chalcopyrite, pyrite and quartz minerals. The ultrasonic process was carried out by a probe-type ultrasound (Sonopuls, 20 kHz and 60 W) at various ultrasonication time (0.5–30 min) and power (0–180 W) while the dissolved oxygen (DO), liquid temperature, conductivity (CD) and pH were continuously monitored. Comparative assessment of wettabilities in the presence of a constant low-powered (60 W) acoustic pre-treatment uncovered that surface of all three minerals became relatively hydrophilic. Meanwhile, increasing sonication intensity enhanced their hydrophilicities to some extent except for quartz at the highest power-level. This was mainly related to generation of hydroxyl radicals, iron-deficient chalcopyrite and elemental sulfur (for chalcopyrite), formation of OH and H radicals together with H2O2 (for pyrite) and creation of SiOH (silanol) groups and hydrogen bond with water dipoles (for quartz). Finally, it was also found that increasing sonication time led to enhancement of liquid temperature and conductivity but diminished pH and degree of dissolved oxygen, which indirectly influenced the mineral wettabilities and floatabilities. Although quartz and pyrite ultrasound-treated micro-flotation recoveries were lower than that of conventional ones, an optimum power-level of 60–90 W was identified for maximizing chalcopyrite recovery.

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Section: Introductionmentioning

confidence: 99%

Effect of Power Ultrasound on Wettability and Collector-Less Floatability of Chalcopyrite, Pyrite and Quartz

et al. 2021

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“…It is also seen that the microcavitation characterized by ultrasonic treatment changes the distribution principles and mechanisms of fine particles in the pulp by subjecting the particle -particle bonds to degradation. Thus, the distribution of slime size particles in the ultrasonic environment is reduced, as is suggested by previous researchers [65][66][67][68].…”

Section: Discussionmentioning

confidence: 81%

Effects of Ultrasound on Desliming Prior to Feldspar Flotation

Malayoğlu

Özkan

2019

Minerals

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In this study, the effects of ultrasound on removal of impurities from raw feldspar were investigated by testing with a newly developed flotation cell with various frequency and power intensities prior to multistage feldspar flotation. Particularly, the quality of feldspar concentrates, the volume of removed slimes and the content of impurities were taken into account to reveal the impacts. Two representative feldspar ore samples taken from the Milas-Mugla region in Turkey were separately tested for desliming and flotation by conventional and ultrasonic methods under similar conditions and the results were compared to each other in terms of the quantity and the quality of the removed slimes and the final feldspar flotation concentrate. As a result, during desliming stage by using ultrasound, the volume of removed slimes was reduced by approximately 45% when compared to the conventional slime removal methods. Moreover, the impurity contents were doubled inside slimes when ultrasound was used. These outcomes lead to significant success in terms of reducing losses during the desliming stage and production of high quality feldspar concentrates by froth flotation assisted by ultrasound.

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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%

“…The ultrasonic application creates micro-bubbles in the pulp with sizes of around 100 µm (Gungoren et al, 2019). These bubbles cavitate on the mineral surface, creating pressures and temperatures in the order of 100-5000 atmosphere (Pa) and 1000-5000°C (Zhou et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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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Effect of ultrasound on bubble-particle interaction in quartz-amine flotation system

Cited by 61 publications

References 47 publications

Effect of Power Ultrasound on Wettability and Collector-Less Floatability of Chalcopyrite, Pyrite and Quartz

Effect of Power Ultrasound on Wettability and Collector-Less Floatability of Chalcopyrite, Pyrite and Quartz

Effects of Ultrasound on Desliming Prior to Feldspar Flotation

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

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