Improved Collector for Beneficiation of Low-Volatile Medium Ash Clean Coal Fines by Froth Flotation

Chaudhuri, Sanjay; Kalyani, V. K.; Charan, T. Gouri; Kumari, Sweta; Sinha, A.

doi:10.1080/19392699.2014.896350

Cited by 13 publications

(2 citation statements)

References 14 publications

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“…For conventional flotation of 51 # and 62 # coals, increases in flotation rate constants of combustible matter and ash material were obtained with the increase in collector and frother dosages. The increase in flotation rate constant was attributed to the fact that increasing collector dosage would enhance the collision probability between coal particles and oil droplets because of the enhanced adsorption of the collector on coal surfaces . Thus, more and more coal particles can be reported to the concentrate.…”

Section: Resultsmentioning

confidence: 99%

Discrimination of Six Flotation Kinetic Models Used in the Conventional Flotation and Carrier Flotation of −74 μm Coal Fines

Wang

Zhou

et al. 2020

ACS Omega

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In this study, experimental results of conventional flotation and carrier flotation were characterized by six commonly used flotation kinetic models. Two statistical criteria (coefficient of determination, R 2, and root mean square error, RMSE) were used for comparison of fitting performance of different models. All kinetic models tested gave good levels of goodness of fit, but the second-order model with rectangular distribution (model 6) provided the best fitting performance for the experimental data of conventional flotation and carrier flotation. On this basis, two parameters, that is, modified flotation rate constant (K m) and selectivity index (SI), were used to evaluate the difference in flotation separation selectivity between conventional flotation and carrier flotation. Comparisons of K m and SI values indicated that carrier flotation significantly improved the flotation rate constant of combustible materials and flotation separation selectivity of ultrafine coal (−74 μm). In addition, measurements of average bubble size and water recovery indicated that both the coalescence of bubbles and the drainage of liquid in the froth were promoted when coarse coal particles (contact angle >90°) were employed as the carrier to assist the flotation recovery of ultrafine particles, which in turn favored the inhibition effect of the entrainment of gangue materials in carrier flotation compared to conventional flotation.

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Section: Resultsmentioning

confidence: 99%

Discrimination of Six Flotation Kinetic Models Used in the Conventional Flotation and Carrier Flotation of −74 μm Coal Fines

Wang

Zhou

et al. 2020

ACS Omega

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“…The presence of LDD can produce a better dispersion state of kerosene in water and smaller oil droplets, which leads to the enhanced collision probability between graphite particles and oil droplets [27]. Under the same dosage of emulsified kerosene, the smaller droplets have a greater specific surface area, which is conducive to colliding with, adhering to, and spreading onto the sample particles, rendering them more hydrophobic [28]. Hence, the emulsification of kerosene contributes to improved flotation yields for oxidized coal.…”

Section: Oil Droplet Sizementioning

confidence: 99%

Enhancement of Flotation Performance of Oxidized Coal by the Mixture of Laurylamine Dipropylene Diamine and Kerosene

Zhang

Niu

et al. 2021

Minerals

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Conventional hydrocarbon oil cannot adhere effectively to oxidized coal, resulting in a low yield of clean coal. In this study, a high-speed homogenizer was used to emulsify LDD (laurylamine dipropylene diamine) and kerosene, which enhanced the flotation efficiency of oxidized coal. The flotation results showed an increase from 4.12% (only kerosene) to 23.33% (emulsified oil). An increase in contact angle indicated that the mixture reagent can increase the hydrophobicity of coal particles, which is attributed to the adsorption of LDD onto the coal particle surface and the decrease of the oil droplet A lower surface tension of LDD allows it to produce a stable layer of froth than the layer generated by kerosene alone.

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Application of Response Surface Methodology for Effective Recovery of Indian Coking Coal Fines Through Froth Flotation Technique

Sarma

Sanjay

Chandra

et al. 2022

J. Inst. Eng. India Ser. D

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Improved Collector for Beneficiation of Low-Volatile Medium Ash Clean Coal Fines by Froth Flotation

Cited by 13 publications

References 14 publications

Discrimination of Six Flotation Kinetic Models Used in the Conventional Flotation and Carrier Flotation of −74 μm Coal Fines

Discrimination of Six Flotation Kinetic Models Used in the Conventional Flotation and Carrier Flotation of −74 μm Coal Fines

Enhancement of Flotation Performance of Oxidized Coal by the Mixture of Laurylamine Dipropylene Diamine and Kerosene

Application of Response Surface Methodology for Effective Recovery of Indian Coking Coal Fines Through Froth Flotation Technique

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