Fine coal dry beneficiation using autogenous medium in a vibrated fluidized bed

Yang, Xuliang; Zhao, Yuemin; Z, Luo; Song, Shulei; Chen, Zengqiang

doi:10.1016/j.minpro.2013.10.003

Cited by 57 publications

(18 citation statements)

References 11 publications

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“…Using the ash segregation intensity as a reference, [16] the oil segregation intensity S oil can be calculated as follows:…”

Section: Discussionmentioning

confidence: 99%

Separation of <6 mm oil shale using a compound dry separator

et al. 2017

Separation Science and Technology

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A large amount of fine granular materials (<6 mm) are produced during the mining of oil shale. The combustion characteristics of oil shale improve with decreasing size of these materials, for which reason fine-grain oil shale has a high utility value. However, fine oil shale also contains a significant amount of inorganic mineral impurities which can be reduced by physical separation to improve the oil quality. Based on an analysis of the physical properties of oil shale, this paper proposes a compound dry separation process for the cleaning of <6 mm oil shale grains. The effects of the vibration intensity, air velocity, and back angle of the employed separator on the separation results and oil content of the cleaned oil shale were systematically analyzed. Under the optimal vibrational conditions defined by a vibration intensity of 25.76 (amplitude = 4.0 mm, frequency = 40 Hz), air velocity of 0.66 m/s, and back angle of 45°, the yield comprised 35.8% concentrate and 64.2% tailings, with corresponding oil contents of 10.02% and 0.85%, respectively. The probable error of the highest intensity of segregation achieved was 0.155. The proposed compound dry separation of oil shale particles of up to 6 mm was found to be more efficient compared with conventional methods, and the separated fine grade material can be comprehensively utilized by further pyrolysis treatment. ARTICLE HISTORY

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“…Using the ash segregation intensity as a reference, [16] the oil segregation intensity S oil can be calculated as follows:…”

Section: Discussionmentioning

confidence: 99%

Separation of <6 mm oil shale using a compound dry separator

et al. 2017

Separation Science and Technology

Self Cite

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“…For the coal resources with abundant reserves in northwest of China where is extremely short of water, dry coal preparation technology is urgently needed. Dry coal separation has more advantages than wet coal separation [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Dynamical characteristics and vibration behavior of the novel composite dry separator

Li¹,

Zhou²,

Shen³

et al. 2022

Vib. proced.

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At present, the composite dry separation technology is a successful technology in coal gangue discharge. In this paper, the mechanical structure of the novel composite dry separator (NCDS) was revealed, and the dynamic characteristics and vibration behaviors of the separator were deeply discussed by combining theoretical modeling and experimental testing methods. The dynamic mechanics mathematical model of the NCDS was established. The dynamic experiment of the separator was carried out by using the vibration testing system to reveal the space-time characteristics of the NCDS and compared with the theoretical results. The results show that the error between experimental data and theoretical data is less than 6.78 %. This work should be useful for optimal design and efficient operation of the composite dry separator.

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“…Thus, it is very important to give careful consideration to the advantages of dry separation. Moreover, dry coal separation has more advantages compared to wet coal separation [4][5][6][7][8][9][10][11], for example, it does not consume water resources, does not increase the moisture content of separated products, and does not pollute groundwater and ecological environment. As a result, it can reduce damage to the environment.…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Characteristics of the Partition Plate Unit on the Separating Process of −6 mm Fine Coal in the Compound Dry Separator

Chen

Wang

et al. 2019

Minerals

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Although compound dry separation technology has been applied to industrial applications for +6 mm size fraction of coal separation, the technology has not been widely applied in the separation of fine coal (−6 mm). In this study, the effect of the partition plate unit characteristics on both the average density of particles in the bed uniformly and the final separation results in a fine coal separation process were studied. According to the results, the standard deviations of the corresponding density distribution were 0.08, 0.14, and 0.07 when the height of the partition plate was 2.5 cm, the partition plate angle was 35°, and the distance from the apex of partition plate on the backplane, was 12 cm, respectively, which were the lowest values at the same level. These results showed that the average density of particles in the bed was uniformly, and its corresponding density distribution contour map was more regular. When the amplitude was 2.8 mm, the frequency was 29 Hz, the height of the partition plate was 2.5 cm, the partition plate angle was 35°, and the distance from the apex of the partition plate to the backplane was 12 cm; as a result, the E value was 0.115 g/cm3, the yield of the concentrate was 69.24%, the ash content was 12.52%, and the separation effect was better. The characteristics of the partition plate unit have an important effect on the separating process of −6 mm fine coal in the compound dry separator.

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Fine coal dry beneficiation using autogenous medium in a vibrated fluidized bed

Cited by 57 publications

References 11 publications

Separation of <6 mm oil shale using a compound dry separator

Separation of <6 mm oil shale using a compound dry separator

Dynamical characteristics and vibration behavior of the novel composite dry separator

The Effect of the Characteristics of the Partition Plate Unit on the Separating Process of −6 mm Fine Coal in the Compound Dry Separator

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