Industrial Application of a Modularized Dry-Coal-Beneficiation Technique Based on a Novel Air Dense Medium Fluidized Bed

Zhao, Yuemin; Li, Gongmin; Luo, Zhenfu; Zhang, Bo; Dong, Liang; Liang, Chuncheng; Chen, Duan

doi:10.1080/19392699.2015.1125344

Cited by 58 publications

(17 citation statements)

References 30 publications

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“…Efficient dry beneficiation technologies without water are required urgently. Industrial application of the dry beneficiation technology based on an air dense medium fluidized bed (ADMFB) − is efficient for coal separation with +6 mm in size. − However, separation of coal with −6 mm in size is still challenging and deserves further investigation.…”

Section: Introductionmentioning

confidence: 99%

Fluidization Characteristics of a Pulsing Dense-Phase Gas–Solid Fluidized Bed for High-Density Separation of Fine Anthracite

et al. 2016

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Coal is one of the most important primary energy sources worldwide that requires an economic, effective, and clean preparation method. As the shortage of water resources increases, the wet beneficiation technology became questionable. The air dense medium fluidized bed (ADMFB) is a good alternative for dry coal beneficiation processes that require no water. In this account, a pulsating air flow was introduced into the ADMFB system to generate a pulsing dense-phase gas–solid fluidized bed (PDGFB). The effects of the pulsating air flow on the minimum fluidization velocity, stability of the bed density, and motion of the heavy medium were investigated. The pulsating air flow is shown to reduce the minimum of the fluidization velocity, modify the stability of the bed density, and regularize the motion of the heavy medium. Fine anthracite of −6 + 1 mm size is cleaned using PDGFB at elevated separation densities with a true value of 2.03 g/cm3 and probable error (E) of 0.09 g/cm3. In comparison to vibrated fluidized beds, PDGFB has no mechanical vibration and, hence, is advantageous in terms of the mechanical structure, easy operation, and susceptibility to lower failure.

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Section: Introductionmentioning

confidence: 99%

Fluidization Characteristics of a Pulsing Dense-Phase Gas–Solid Fluidized Bed for High-Density Separation of Fine Anthracite

et al. 2016

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“…Screening plays a key role in the classification, medium draining, product dehydration, and desliming of coal [1][2][3]. In recent years, the dry deep screening of moist and fine minerals, which can simplify the cleaning process, has become increasingly essential for coal classification [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Vibration Characteristics of an Industrial‐Scale Flip‐Flow Screen with Crank‐Link Structure and Parameters Optimization

Liu

Shen

et al. 2021

Shock and Vibration

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Flip-flow screens are increasingly used in the processing of fine wet coal. In this work, the vibration characteristics of an industrial-scale flip-flow screen with crank-link structure (FFSCLS) were investigated theoretically and experimentally. An improved kinematic model of FFSCLS was proposed and experiments are carried out to verify the reasonability. The effects of the key parameters of the eccentricity of the crankshaft, the rotational speed of the crankshaft, and the tension length of the screen surface on the vibration characteristics of the screen were investigated parametrically. The results show that the kinematic model can describe the vibration characteristics of screen perfectly with the maximum error between the theoretical and experimental results being within 6.96%. Moreover, the key parameters of the eccentricity of the crankshaft, the rotational speed of the crankshaft, and the tension length of the screen surface have significant effects on the vibrations of the screen body and screen surface. These parameters should be optimized to achieve maximum screening performance of the FFSCLS. This work should be useful for optimal design and efficient operation of the flip-flow screen.

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“…Compared with other externalforce fluidized beds, the traditional fine-particle fluidized separation technology does not need too much extra energy; since energy consumption means an increase in carbon emissions, it is not conducive to the implementation of the carbon neutralization policy. Furthermore, the industrial modular fluidized bed process has been improved, limiting the system's dimensions and achieving its rapid construction, which can also reduce carbon emissions [29]. Therefore, the traditional fine-particle fluidized separation technology could help achieve carbon neutrality.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Bed Expansion and Separation Density of Gas–Solid Separation Fluidized Beds Using a Micron-Sized-Particle-Dense Medium

Fan

Zhou

2021

Separations

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Coal is the dominant energy resource in China. With the Chinese policy of committing to reducing peak carbon dioxide emissions and achieving carbon neutrality, coal separation has recently become a hot topic, especially the fluidized separation of fine particles. In this study, micron-sized particles were introduced to ameliorate the properties of the traditional fluidized bed. The expansion characteristics of the micron-sized-particle-dense medium were explored. A bed expansion prediction model of the micron-sized-particle-dense medium was established, and the prediction error was about 10%, providing a theoretical basis for understanding the distribution characteristics of the bed. This model also helped predict the bed density in the presence of a micron-sized-particle-dense medium, and the prediction accuracy was between 85% and 92%, providing a theoretical basis for selecting and popularizing fluidized beds for industrial separation.

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Industrial Application of a Modularized Dry-Coal-Beneficiation Technique Based on a Novel Air Dense Medium Fluidized Bed

Cited by 58 publications

References 30 publications

Fluidization Characteristics of a Pulsing Dense-Phase Gas–Solid Fluidized Bed for High-Density Separation of Fine Anthracite

Fluidization Characteristics of a Pulsing Dense-Phase Gas–Solid Fluidized Bed for High-Density Separation of Fine Anthracite

Vibration Characteristics of an Industrial‐Scale Flip‐Flow Screen with Crank‐Link Structure and Parameters Optimization

Estimation of Bed Expansion and Separation Density of Gas–Solid Separation Fluidized Beds Using a Micron-Sized-Particle-Dense Medium

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