Processing of coal fines in a water-only cyclone

Majumder, A. K.; Barnwal, J. P.

doi:10.1016/j.fuel.2010.10.038

Cited by 41 publications

(6 citation statements)

References 2 publications

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“…The fine particles will decrease the secondary gravity separation efficiency [4]. Therefore, the desliming cylinder of the TPC will play a significant role in the separation system [16].…”

Section: Regression Models Of Ash Contents and Yields Of Clean Coalmentioning

confidence: 99%

“…Ash reduction of all size fractions has also been calculated using Equation 3 and they are presented in Table 7 [4]. where A c is the ash content of the clean coal (%), A f is the ash content of the feed, and AR is the Ash Reduction.…”

Section: Ash Reduction By the Classified Gravity Systemmentioning

confidence: 99%

“…Color versions of one or more of the figures in the article can be found online at www.tandfonline.com/gcop. more advantages of treating coarse fractions such as -1+0.5 mm fractions [4]. After that, the fine material (-0.5 mm or finer) of fine coal can be smoothly treated.…”

Section: Introductionmentioning

confidence: 99%

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The Beneficiation of Fine Coal by a Combination of Three-Product Cyclone and Fine Screen

Yuan

et al. 2016

International Journal of Coal Preparation and Utilization

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A novel classified gravity system, comprised of a three-product cyclone and a fine high-frequency screen, was developed and tested for recovery of fine coal. The three-product cyclone is characterized by the primary cylinder and a secondary cyclone. The effects of major parameters of the secondary cyclone, such as vortex finder diameter, vortex finder length, and spigot diameter, were investigated by single-factor experiments. Regression models of the yield and ash content of clean coal were developed with statistical design of experiments and showed good correlations of experimental results. The regression models indicated that the spigot diameter had the largest impact on the yield and ash content of clean coal. It also indicated that spigot diameter and vortex finder diameter jointly affect performances of the three-product cyclone. The cylinder played a significant role in desliming of the feed, giving the secondary cyclone a better gravity-separation condition. Ash reductions of +0.150 mm fractions were all above 70%, which showed that the cyclone had significant effects on fine coal separation in the classified gravity system. ARTICLE HISTORY

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“…The fine particles will decrease the secondary gravity separation efficiency [4]. Therefore, the desliming cylinder of the TPC will play a significant role in the separation system [16].…”

Section: Regression Models Of Ash Contents and Yields Of Clean Coalmentioning

confidence: 99%

Section: Ash Reduction By the Classified Gravity Systemmentioning

confidence: 99%

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The Beneficiation of Fine Coal by a Combination of Three-Product Cyclone and Fine Screen

Yuan

et al. 2016

International Journal of Coal Preparation and Utilization

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“…2. In coal preparation plants, the raw coal mined from different locations is sampled and analyzed [18]. This analysis provides the coal washing plant with the prior information about the percentages of different components in the raw coal.…”

Section: Controller Designmentioning

confidence: 99%

Medium Density Control for Coal Washing Dense Medium Cyclone Circuits

Zhang

Xia

Zhang

2015

IEEE Trans. Contr. Syst. Technol.

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The dense medium cyclone (DMC) process used in coal beneficiation plants is studied from a control system perspective. Employing the dynamic model of the DMC process derived from mass flow balance, a model-based control strategy is proposed. The controller adjusts the density of medium used to enhance separation in the DMC process according to measurements on percentages of different components in raw coal. The first objective of the control is to maintain the carbon content in the clean coal to a set level. The second purpose is to minimize energy consumption of the DMC process in view of the fast increasing electricity price. The controller solves an optimization problem formulated to determine the density of medium whenever new measurements are available. Both coal quality and DMC operational constraints are accounted for. Simulations, based on measured plant data, are carried out to verify the feasibility and effectiveness of the control strategy designed. The results show that the designed controller is able to fulfill its purpose satisfactorily when the characteristics of the raw coal varies and when measurement uncertainties are in presence.Index Terms-Coal beneficiation, dense medium cyclone (DMC), density control, feed forward control, optimal control.

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“…The wide cone angle of a WOC is responsible for creating an autogeneous rotating bed of particles along the conical section of the cyclone [7]. The autogeneous medium consists of water, solid particles, and gas when air is injected into the WOC.…”

Section: Downloaded By [University Library Utrecht] At 06:34 16 Marchmentioning

confidence: 99%

Performance of an Air-Injected Water-Only Cyclone for the Separation of Fine Coal

Liu

Fan

2013

International Journal of Coal Preparation and Utilization

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Effects of the air injection into a water-only cyclone on the separation performance of the cyclone treating coal in the 1 Â 0 mm particle size range were investigated. The results showed that by using air injection the water-only cyclone had a good density separation for the þ0.125 mm size fraction and minimized the effects of the particle size. When the gas-liquid ratio increased, the density cut-point decreased, as did the Ecart probable (E p ) value, which could be reduced to 0.05 for the þ0.5 mm size fraction. Therefore, the density cut-point of a water-only cyclone can be adjusted in real time by changing the gas-liquid ratio to meet variable market requirements.

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Processing of coal fines in a water-only cyclone

Cited by 41 publications

References 2 publications

The Beneficiation of Fine Coal by a Combination of Three-Product Cyclone and Fine Screen

The Beneficiation of Fine Coal by a Combination of Three-Product Cyclone and Fine Screen

Medium Density Control for Coal Washing Dense Medium Cyclone Circuits

Performance of an Air-Injected Water-Only Cyclone for the Separation of Fine Coal

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