Upgrading Coal Using a Pneumatic Density-Based Separator

Honaker, R.Q.; Saracoglu, Mehmet; Thompson, E. David; Bratton, Robert C.; Luttrell, G.H.; Richardson, V.

doi:10.1080/19392690801934054

Cited by 40 publications

(14 citation statements)

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“…The operating variables evaluated during the pilot-scale testing in India were the table slope (length-wise angle), the table oscillating frequency, and the main fan motor speed (Honaker and Luttrell 2007;Gupta et al 2012). Honaker et al (2008) parametric studies on the pilot-scale unit for the U.S. coals and indicated that the table crosswise angle had minimal influence on the separation performance, and therefore, can be held constant. Table 1 exhibits a comprehensive analysis of the products obtained from the pilot tests conducted at the three test sites.…”

Section: Resultsmentioning

confidence: 99%

“…Removing unwanted rock from run-of-mine (ROM) coal is referred to as deshaling, which normally involves separation of high-density rock from raw coal in a density-based process. In contrast to traditional coal preparation plants, the separation relative density (RD) for deshaling is higher with a typical target of RD = 2.0 or greater (Honaker et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of pneumatic inclined deck separator for high-ash Indian coals

Gupta

2016

Int J Coal Sci Technol

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Application of pneumatic separators in coal beneficiation is increasing rapidly over the last decade primarily due to their low capital and operating costs, and waste handling problems associated with traditional wet processing methods. Large amount of shale/rock that is extracted in coal production can be removed prior to transportation at the mine face by using this methodology. Due to the limited washing facilities in India, most of the thermal power plants burn raw coal from run-of-mine (ROM) to generate electricity. This practice causes poor utilization efficiency, high operating and maintenance costs, and high emission rates for the power plants. One potential method that can be utilized is the air-fluidized inclined vibrating deck technology. The technology was demonstrated on a pilot-scale at different coal washeries in India at a feed rate of 5-ton per hour. The pilot-scale evaluation showed that 20 %-25 % high-ash incombustible material can be eliminated from ROM feed with only minor losses in energy content (\10 %) from respective ROM coal. Furthermore, a feasibility analysis showed significant economic gains in terms of transportation cost, improving power-plant efficiency, and reducing emissions rates by using the technology.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of pneumatic inclined deck separator for high-ash Indian coals

Gupta

2016

Int J Coal Sci Technol

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“…The advent of efficient wet processing units and demand for higher-quality minerals facilitated the decline. However, scarcity of water, downstream process water decontamination issues, and stricter environmental regulations concerning effluent discharge augmented by increasing capital expenditure on treating slurry impoundments have resulted in a significant increase in industry interest in effective dry cleaning solutions [2][3][4][5][6]. Dry cleaning is making a strong comeback in the twenty-first century.…”

Section: Introductionmentioning

confidence: 99%

Scale and Numerical Modeling of an Air-Based Density Separator

Ghosh

Rezaee

Honaker

et al. 2014

Progress in Scale Modeling, Volume II

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The development of an air-based density separator for effectively treating finer-size fraction (6 mm Â 1 mm) of run-of-mine coal is essential for the industry. Based on the derived scaling laws, the full-scale model of a laboratory air-based density separator and a prototype model scaled down by the factor of ½ in the X, Y, and Z directions were simulated using numerical methods. The air velocity contour plots, vector plots, and turbulent intensity values were used to validate the scaling laws. The absolute percent difference of air velocity between the two models was 3.83 %. In addition to this finding, the air velocity contour and vector plot and the turbulent intensity contours in two models showed modest variation, thereby indicating the validity of the scaling laws. The publication details the development of the full-scale and the prototype numerical models and the correlation of the derived scaling laws with the numerical and the experimental results.

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“…The mechanism of triboelectrostatic separation Fig. 12 Schematic diagram of the FGX dry separator and its processing system (Honaker et al 2008) Fig. 13 Detailed separation results of air jig studied by Sampaio et al (2008) Developments of dry coal beneficiation 109 determines that the feed coal must achieve a certain degree of dissociation and the coal particles and the gangue particles mainly exist in the form of monomer.…”

Section: Triboelectrostatic Separationmentioning

confidence: 99%