A review of effects and applications of ultrasound in mineral flotation

Chen, Yuran; Truong, Vu N.T.; Bu, Xiangning; Xie, Guangyuan

doi:10.1016/j.ultsonch.2019.104739

Cited by 115 publications

(48 citation statements)

References 91 publications

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“…As the ultrasonic frequency increases, the intensity of transient cavitation becomes weak. Instead, the stable cavitation effect is enhanced [66] . Unlike the collapse of cavitation bubbles at lower frequencies, bubbles produced at high frequency are much smaller and have a tendency to resonate rather than collapse [67] .…”

Section: The Effect Of Ultrasound Parameters On Bulk Nanobubblesmentioning

confidence: 97%

The effect of ultrasound on bulk and surface nanobubbles: A review of the current status

Alheshibri

2021

Ultrasonics Sonochemistry

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Section: The Effect Of Ultrasound Parameters On Bulk Nanobubblesmentioning

confidence: 97%

The effect of ultrasound on bulk and surface nanobubbles: A review of the current status

Alheshibri

2021

Ultrasonics Sonochemistry

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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].…”

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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“…In addition, micro bubbles were favored to adsorb on hydrophobic particle surface, which also amended hydrophobicity and heightened the efficiency of collision/adhesion between hydrophobic particles and air bubbles for higher flotation recovery rate. It has been also reported that, transient cavitation bubbles generate more fresh and hydrophobic surfaces on the particles surfaces to become profoundly cleaned and more easily picked by flotation [57,58]. Fig.…”

Section: Resultsmentioning

confidence: 93%

Review: Comparison of Ultrasonically Aided Zinc Beneficiation by Mechanical Flotation and Column Flotation Cell

Ulusoy

Kurşun

2021

Eureka: PE

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Zinc is a key beneficiary of economic development for the developing countries. While the global zinc mine production in 2019 was recorded as 13 million tons, the value of zinc mined in 2019, based on zinc contained in concentrate, was about $2.1 billion. Sphalerite or zinc blende (ZnS), which is the main source of zinc, provides more than 90 % of zinc productions today. Beneficiation is usually carried out by flotation to produce marketable concentrates (45–55 %Zn). The flotation, which is the most widely used separation process at fine sizes for the concentration of low grade complex Pb-Cu-Zn ores plays an important role in the global economy. In any concentration plant employing flotation technique huge quantity of ores are being processed. Thus, any increments in the flotation recovery are important to get higher profits and to ensure that resources are utilized optimally. In this review, a comparative evaluation was made between mechanical flotation (MF) [1] and column (CF) [2] cells with or without ultrasonic pre-treatment (UP) for zinc recovery from lead-zinc-copper ore and the effect of UP on the MF and CF experiments were investigated at the optimized conditions. When compared with the optimized parameters, UP increased zinc grade and recovery for both MF and CF techniques as supported by XRD patterns. Besides, the best zinc grade and recovery was obtained by UP with CF technique. So that, sphalerite mineral can be effectively beneficiated to produce saleable zinc concentrate product and UP with CF will lead to a higher metallurgical gains and improvements to Net Smelter Return (NSR). This positive effect of ultrasound, which is safe and eco-friendly, on the zinc flotation by both mechanical cell and column cell regarding zinc grade and recovery is in good agreement with the previous published works in the literature

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A review of effects and applications of ultrasound in mineral flotation

Cited by 115 publications

References 91 publications

The effect of ultrasound on bulk and surface nanobubbles: A review of the current status

The effect of ultrasound on bulk and surface nanobubbles: A review of the current status

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

Review: Comparison of Ultrasonically Aided Zinc Beneficiation by Mechanical Flotation and Column Flotation Cell

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