Fine coal beneficiation by column flotation

Han, Ohhyung; Kim, Minkyu; Kim, Byoung-Gon; Subasinghe, Nimal; Park, Chul-Hyun

doi:10.1016/j.fuproc.2014.04.014

Cited by 56 publications

(15 citation statements)

References 22 publications

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“…The interaction between factors such as flotation reagent, agitation rate and so on is also very important for the separation of very fine particles. Although some studies showed that microbubble flotation had better separation effect on very fine particles, there is still a lack of analysis of limiting deep demineralization of very fine particles in microbubble flotation …”

Section: Introductionmentioning

confidence: 99%

The Effect of Preparation Conditions on Microbubble Flotation Process of Ultra Clean Coal Using Box Behnken Design Model

et al. 2020

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When coal is widely used as fuel, it also produces lower combustion efficiency and environmental pollution due to direct utilization of coal. The demineralization of coal to prepare ultra clean coal can improve utilization value and reduce pollutant emissions. Thus, Taixi anthracite is chosen to prepare ultra clean coal by microbubble flotation method. Box Behnken design (BBD), a response surface model is introduced as a factorial design of experiments setup and used to find those parameters, which affect the ash content and yield of ultra clean coal and to adjust these parameters in order to achieve the optimized effect. Especially, their interaction effect of different factors in flotation process could be explored by the mathematical model. To explore the mechanism of preparing ultra clean coal, X-ray fluorescence (XRF), X-ray diffraction (XRD) and scanning electron microscopy energy dispersive spectroscopy (SEM-EDS) results are analysed. Combining XRF with SEM-EDS analysis, the concentrate is polluted by composite particles with particle size of less than 2 μm and organic matter accounting for more than 95 %. Through XRD and SEM-EDS analysis, it can be shown that a small amount of fine clay minerals including kaolinite and illite agglomerate heterogeneously with coal particles during flotation and pollute concentrate. Further, the existence of composite particles and slime coatings were the main reason of limiting deep demineralization in microbubble flotation process.[a] Dr.

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Section: Introductionmentioning

confidence: 99%

The Effect of Preparation Conditions on Microbubble Flotation Process of Ultra Clean Coal Using Box Behnken Design Model

et al. 2020

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“…Coal beneficiation by froth flotation is a well-established processing method to recover fine particles (mainly below 700 lm) (Dey and Bhattacharyya 2007;Dickinson et al 2015;Jaiswal et al 2015;Wang et al 2017). The oil-based reagents are typical collectors to cover oxidized surfaces of coal particles and improve their float-abilities (Polat et al 1999;Harris and Fuerstenau 2000;Jena et al 2008;Han et al 2014;Wen et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Recovery of coal particles from a tailing dam for environmental protection and economical beneficiations

Asghari

Noaparast

Shafaie

et al. 2018

Int J Coal Sci Technol

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Considerable amounts of coal particles are accumulated in the tailing dams of washing plants which can make serious environmental problems. Recovery of these particles from tailings has economically and environmentally several advantages. Maintaining natural resources and reducing discharges to the dams are the most important ones. This study was examined the possibility to recover coal particles from a tailing dam with 56.29% ash content by using series of processing techniques. For this purpose, gravity separation (jig, shaking table and spiral) and flotation tests were conducted to upgrade products. Based the optimum value of these processing methods, a flowsheet was designed to increase the rate of recovery for a wide range of coal particles. Results indicated that the designed circuit can recover over 90% of value coal particles and reduce ash content of product to less than 14%. These results can potentially be used for designing an industrial operation as a recycling plant and an appropriate instance for other areas to reduce the environmental issues of coal tailing dams.

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“…Its also contains volatile matter, fixed carbon and sulphur, which are relatively small [3]. Silica and alumina are the main minerals contained in it [4][5]. Fine coal briquettes are made for a heat source in small-scale power generation, metals and cement industries.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Carbon Foam Derived from Fine Coal and Phenolic Resin

et al. 2018

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Fine coal beneficiation by column flotation

Cited by 56 publications

References 22 publications

The Effect of Preparation Conditions on Microbubble Flotation Process of Ultra Clean Coal Using Box Behnken Design Model

The Effect of Preparation Conditions on Microbubble Flotation Process of Ultra Clean Coal Using Box Behnken Design Model

Recovery of coal particles from a tailing dam for environmental protection and economical beneficiations

Preparation and Characterization of Carbon Foam Derived from Fine Coal and Phenolic Resin

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