Journal ArticleDOI
Investigation of High-Frequency, High-Intensity Ultrasonics for Size Reduction and Washing of Coal in Aqueous Medium
Reads0
Chats0
TLDR
While ultrasonic coal-wash is not entirely new in many countries, it has not yet been practiced in India, though it would appear that the relatively high-ash content of Indian coals would render th...Abstract:
While ultrasonic coal-wash is not entirely new in many countries, it has not yet been practiced in India, though it would appear that the relatively high-ash content of Indian coals would render th...read more
Citations
More filters
Journal ArticleDOI
Effective removal of sulfur components from Brazilian power-coals by ultrasonication (40kHz) in presence of H2O2.
Binoy K. Saikia,Adilson Celimar Dalmora,Rahul Nath Choudhury,Tonkeswar Das,Silvio R. Taffarel,Luis F.O. Silva +5 more
TL;DR: A preliminary attempt of using ultrasonic energy to clean some low rank high sulfur Brazilian power-coal samples in presence of H2O2 solution demonstrated the formation of oxidized sulfur species (SO and -SO2) and their subsequent removals after ultrasonication.
Journal ArticleDOI
Ultrasound treatment on tailings to enhance copper flotation recovery
TL;DR: In this paper, the impact of the ultrasound wave was examined under different conditions, with the conclusion that improved recovery occurs when ultrasound is applied during conditioning and flotation, which can be explained by the effect of acoustic cavitation that cleans particle surfaces and minimizes slime coatings.
Journal ArticleDOI
Regulation of bubble size in flotation: A review
TL;DR: In this paper, a review of studies of the regulation of bubble size is presented, where the bubble generation, evolution, and action mechanism of different factors on the bubble size are elucidated.
Journal ArticleDOI
Ultrasonic-assisted flotation of fine coal: A review
TL;DR: In this article, the authors highlight the application of ultrasound in cavitation bubbles, reagent emulsification, coal slime pretreatment and simultaneous ultrasonic flotation of fine coal.
Journal ArticleDOI
Ultrasonic-assisted coal beneficiation: A review.
TL;DR: A critical review of the ultrasound mechanism in enhancing coal demineralization, desulphurization, grindability, slurryability and dewatering is reviewed, which can significantly increase the clean coal yield under the substantial effect of cavitation and streaming.
References
More filters
Journal ArticleDOI
Application of Ultrasonic Irradiation for the Degradation of Chemical Contaminants in Water
TL;DR: In this paper, the degradation of chemical compounds by acoustic cavitation is shown to involve three distinct pathways: 1) oxidation by hydroxyl radicals, 2) pyrolytic decomposition and 3) supercritical water oxidation.
Journal ArticleDOI
Ultrasonic fragmentation of agglomerate powders
TL;DR: In this paper, a theory for ultrasonic fragmentation of agglomerate particles suspended in liquids is presented, and an expression for the fragmentation rate as a function of ultra-osnic power and agglerate size is derived.
Journal ArticleDOI
An oxidative desulfurization method using ultrasound/Fenton's reagent for obtaining low and/or ultra-low sulfur diesel fuel
TL;DR: In this article, the authors used a hydrogen peroxide-acetic acid system and a Fenton's reagent system for diesel desulfurization and showed that the addition of Fenton reagent could enhance the diesel desulurization efficiency.
Journal ArticleDOI
Sonic and ultrasonic removal of chemical contaminants from soil in the laboratory and on a large scale.
TL;DR: Current laboratory research and the potential for the scale-up of chemical decontamination is reviewed and two basic mechanisms for acoustically enhanced soil cleaning have been suggested.
Journal ArticleDOI
Experimental investigations on ultrasound mediated particle breakage
Vinay Raman,Ali Abbas,Ali Abbas +2 more
TL;DR: The efficiency of ultrasound energy conversion to particle breakage is calculated using calorimetry and found along with the net breakage efficiency to initially increase with temperature followed by a decrease after the optimum, found to be independent of input ultrasonic power.