Extraction of tungsten from scheelite using hydrodynamic and acoustic cavitation

Johansson, Örjan; Pamidi, Taraka Rama Krishna; Shankar, Vijay

doi:10.1016/j.ultsonch.2020.105408

Cited by 21 publications

(11 citation statements)

References 24 publications

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“…This indicated that ultrasound could renew the reaction surface through its ability to blow out the insoluble solid film layer on the surfaces of graphite particles. A similar phenomenon is commonly observed in processes involving ultrasound-assisted leaching [ [32] , [78] , [79] , [80] ].…”

Section: Resultssupporting

confidence: 71%

Effect of ultrasound power on HCl leaching kinetics of impurity removal of aphanitic graphite

Tong

Bilal

et al. 2023

Ultrasonics Sonochemistry

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Section: Resultssupporting

confidence: 71%

Effect of ultrasound power on HCl leaching kinetics of impurity removal of aphanitic graphite

Tong

Bilal

et al. 2023

Ultrasonics Sonochemistry

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“…Cavitation is mostly known as an undesirable phenomenon, and most of the studies [1][2][3] on the physics of cavitation aimed to prevent it or decrease its detrimental effects. However, applications of HC at the conventional scale have been successfully realized in the food and beverage industry [4][5][6] and hydrometallurgy 7 . Furthermore, its extensive applications at the microscale are emerging, such as wastewater treatment 8 , biomedical applications [9][10][11] , energy harvesting 12,13 , and liquid phase exfoliation 14 .…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of a vigorous “cavitation-on-a-chip” device with a multiple microchannel configuration

et al. 2021

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Hydrodynamic cavitation is one of the major phase change phenomena and occurs with a sudden decrease in the local static pressure within a fluid. With the emergence of microelectromechanical systems (MEMS), high-speed microfluidic devices have attracted considerable attention and been implemented in many fields, including cavitation applications. In this study, a new generation of ‘cavitation-on-a-chip’ devices with eight parallel structured microchannels is proposed. This new device is designed with the motivation of decreasing the upstream pressure (input energy) required for facile hydrodynamic cavitation inception. Water and a poly(vinyl alcohol) (PVA) microbubble (MB) suspension are used as the working fluids. The results show that the cavitation inception upstream pressure can be reduced with the proposed device in comparison with previous studies with a single flow restrictive element. Furthermore, using PVA MBs further results in a reduction in the upstream pressure required for cavitation inception. In this new device, different cavitating flow patterns with various intensities can be observed at a constant cavitation number and fixed upstream pressure within the same device. Moreover, cavitating flows intensify faster in the proposed device for both water and the water–PVA MB suspension in comparison to previous studies. Due to these features, this next-generation ‘cavitation-on-a-chip’ device has a high potential for implementation in applications involving microfluidic/organ-on-a-chip devices, such as integrated drug release and tissue engineering.

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“…Cavitation is a vital hydrodynamic phenomenon in many scientific and engineering fields [ 1 , 2 , 3 ]. Its advantages in applications have drawn much attention from researchers, such as its high efficiency and micro-scaled size.…”

Section: Introductionmentioning

confidence: 99%

“…According to the means of generation, cavitation can be categorized into four types: acoustic, hydrodynamic, optic, and particle cavitations, which are all applied in various fields. Among these, ultrasonic cavitation is one of the most important cavitation patterns, which has been widely used in daily life and the industry, such as ultrasonic cleaning [ 8 ], and food or medicine processing [ 1 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Surface Tension on Dynamic Characteristics of Single Bubble in Free-Field Exposed to Ultrasound

Lai

et al. 2022

Micromachines

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The motion of bubbles in an ultrasonic field is a fundamental physical mechanism in most applications of acoustic cavitation. In these applications, surface-active solutes, which could lower the surface tension of the liquid, are always utilized to improve efficiency by reducing the cavitation threshold. This paper examines the influence of liquids’ surface tension on single micro-bubbles motion in an ultrasonic field. A novel experimental system based on high-speed photography has been designed to investigate the temporary evolution of a single bubble in the free-field exposed to a 20.43 kHz ultrasound in liquids with different surface tensions. In addition, the R-P equations in the liquid with different surface tension are solved. It is found that the influences of the surface tension on the bubble dynamics are obvious, which reflect on the changes in the maximum size and speed of the bubble margin during bubble oscillating, as well as the weaker stability of the bubble in the liquid with low surface tension, especially for the oscillating bubble with higher speed. These effects of the surface tension on the bubble dynamics can explain the mechanism of surfactants for promoting acoustic cavitation in numerous application fields.

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Extraction of tungsten from scheelite using hydrodynamic and acoustic cavitation

Cited by 21 publications

References 24 publications

Effect of ultrasound power on HCl leaching kinetics of impurity removal of aphanitic graphite

Effect of ultrasound power on HCl leaching kinetics of impurity removal of aphanitic graphite

Design and fabrication of a vigorous “cavitation-on-a-chip” device with a multiple microchannel configuration

Influence of Surface Tension on Dynamic Characteristics of Single Bubble in Free-Field Exposed to Ultrasound

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