Influence of Coal Feed Size on the Performance of Air Dense Medium Fluidized Bed Separator Used for Coal Beneficiation

Mohanta, S.; Chakraborty, Sudipto; Meikap, B.C.

doi:10.1021/ie201548r

Cited by 32 publications

(12 citation statements)

References 17 publications

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“…The separation results show that the ash content is reduced from 40 % in feed coal to around 32 %-35.5 % in clean coal product with a 60 %-72 % yield and the separation efficiency E value is 0.12. Mohanta et al (2011Mohanta et al ( , 2012Mohanta et al ( , 2013a had made many efforts to optimize the operational parameters and the feed coal properties in order to achieving an optimum beneficiation performance of an ADMFB separator. It was pointed out that when the feed coal size is below 15 mm, the size effect on sharpness in separation becomes significant and the E values decrease faster.…”

Section: Separation With Air Dense Medium Fluidized Bedmentioning

confidence: 99%

Progress in developments of dry coal beneficiation

Zhao

Yang

et al. 2014

Int J Coal Sci Technol

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Section: Separation With Air Dense Medium Fluidized Bedmentioning

confidence: 99%

Progress in developments of dry coal beneficiation

Zhao

Yang

et al. 2014

Int J Coal Sci Technol

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“…According to the distribution of thermal coal in China, the focus of washing and processing of thermal coal is bound to shift to the west and north regions. While wet coal cleaning process becomes less realistic in the western arid northern regions due to less water, and dry cleaning technique has been widely promoted and applied due to water less, simple process and eliminating the need for water and follow-up of complex slime water treatment process in the wet coal preparation, which reduces costs, reduces sewage discharge, and protects the environment in recent years [1].…”

Section: Introductionmentioning

confidence: 99%

A wholegrain level dry separation system for thermal coal sorting Analysis

Zhu¹,

Zhao²

2016

Proceedings of the 2016 International Conference on Mechanics, Materials and Structural Engineering

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Abstract. This paper presents a dry separation system for thermal coal sorting in which the major grading equipment don't need to water, to avoid the shortage of the traditional wet separation process along with the complex slime water treatment systems, simplifying the process, and reducing the costs, meeting the environments require for the western and northern of China where rich coal but less water. The dry coal preparation system proposed the ideal coal size-grading, 6mm granularity points, for the dry separation system of thermal coal, based on the size requirements, 65 0mm, of dry separation equipment for the efficient separation and the requirements size, <6mm, of the circulating fluidized bed boilers for power generation, to ensure that the system can run efficiently in order to promote the strategy change from transporting coal to transmitting electricity.

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“…17 The influence of feed size was studied, −50+15 mm is the efficiency feed size range. 18 This technique offers the coal preparation engineer an effective and straightforward method for determining the optimum cut points of separation for different coals to achieve maximum economic gain. 19 Different consumers have different needs, and a method is presented to determine the optimum operating parameters and to predict the economic feasibility in different situations.…”

Section: Introductionmentioning

confidence: 99%

High Ash Fine Coal Dry Cleaning and Stability of Shallow Bed Dense-Phase Gas–Solid Separation Fluidized Bed

et al. 2014

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Fine coal dry separation technology has been one of the international research hotspots in the field of coal preparation. This article proposes the shallow bed dense-phase gas−solid fluidized bed separation technology to remove gangue from the high ash fine coal. According to the criterion of center pressure drop, the C P value can be finally reduced by reducing the bed height, H, to decrease the bed pressure drop, ΔP B , under the condition of a fixed gas distributor pressure drop, ΔP D . A fluidized bed of uniform and stable density was formed. The medium of 33% fine particles showed a better performance in −6+3 mm, −3+2 mm, and −2+1 mm fine coal separation than the medium of different fine particles content by ash segregation. A 100 mm bed height with a medium of 33% fine particles was selected to separate −6+3 mm fine coal. The ash content of cleaned coal reached 9.66% under the optimized conditions, whereas the clean coal yield reached more than 77.75%. For −3+2 mm fine coal, the cleaned coal yield was 82.59%, the ash content of clean coal was 10.93%, and the deash rate could reach 51.96%. The shallow bed dense-phase gas−solid fluidized bed exhibited poor liquidity and high viscosity under conditions of low gas velocities. The shallow bed dense-phase gas−solid fluidized bed (100 mm bed height) with medium containing 33% fine particles can separate the −6+2 mm fine coal.

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Influence of Coal Feed Size on the Performance of Air Dense Medium Fluidized Bed Separator Used for Coal Beneficiation

Cited by 32 publications

References 17 publications

Progress in developments of dry coal beneficiation

Progress in developments of dry coal beneficiation

A wholegrain level dry separation system for thermal coal sorting Analysis

High Ash Fine Coal Dry Cleaning and Stability of Shallow Bed Dense-Phase Gas–Solid Separation Fluidized Bed

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