Systematic study of the effect of particle density distribution on the flow and performance of a dense medium cyclone

Jiang Chen, Kaiwei Chu, Ruiping Zou, Aibing Yu, Andrew Vince, G. D. Barnett, P. J. Barnett

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Dense medium cyclone (DMC) is widely used to upgrade run-of-mine coal in modern coal preparation plants. The flow within it is very complicated, with multi-phases involved including air, water, coal and magnetic/non-magnetic particles of different sizes, densities and other properties. In this work, the effect of coal particle density distribution, one of the most important variables and highly related to coal type, is systematically studied using a combined approach of Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM). In particular, the so called Johnson's SB function, which can describe a wide range of distributions, is employed to represent different particle density distributions. For a given density range, the function is characterized by two parameters: median particle density ρ0.5 and distribution parameter σj, with the latter describes the spread of the distribution. The effects of the two parameters on the flow and performance of a typical DMC are quantified. Moreover, their implication to practical operation, e.g. when the amount of near gravity material is high, is discussed. The results are also analysed in terms of the medium and particle flow fields, particle-fluid, particle-particle and particle-wall interaction forces to understand the fundamentals of the operation. The results obtained in this work should be useful to the design and control of DMC operations with different coal density distributions or coal types.
Original languageEnglish
Pages (from-to)510-523
Number of pages14
JournalPowder Technology
Volume314
DOIs
Publication statusPublished - 1 Jun 2017

Keywords

  • Dense medium cyclone
  • Particle density distribution
  • Discrete element method
  • Computational fluid dynamics
  • Coal preparation

Cite this

@article{e14c9f14c4e949889bae283a8e480f9e,
title = "Systematic study of the effect of particle density distribution on the flow and performance of a dense medium cyclone",
abstract = "Dense medium cyclone (DMC) is widely used to upgrade run-of-mine coal in modern coal preparation plants. The flow within it is very complicated, with multi-phases involved including air, water, coal and magnetic/non-magnetic particles of different sizes, densities and other properties. In this work, the effect of coal particle density distribution, one of the most important variables and highly related to coal type, is systematically studied using a combined approach of Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM). In particular, the so called Johnson's SB function, which can describe a wide range of distributions, is employed to represent different particle density distributions. For a given density range, the function is characterized by two parameters: median particle density ρ0.5 and distribution parameter σj, with the latter describes the spread of the distribution. The effects of the two parameters on the flow and performance of a typical DMC are quantified. Moreover, their implication to practical operation, e.g. when the amount of near gravity material is high, is discussed. The results are also analysed in terms of the medium and particle flow fields, particle-fluid, particle-particle and particle-wall interaction forces to understand the fundamentals of the operation. The results obtained in this work should be useful to the design and control of DMC operations with different coal density distributions or coal types.",
keywords = "Dense medium cyclone, Particle density distribution, Discrete element method, Computational fluid dynamics, Coal preparation",
author = "Jiang Chen and Kaiwei Chu and Ruiping Zou and Aibing Yu and Andrew Vince and Barnett, {G. D.} and Barnett, {P. J.}",
year = "2017",
month = "6",
day = "1",
doi = "10.1016/j.powtec.2016.11.041",
language = "English",
volume = "314",
pages = "510--523",
journal = "Powder Technology",
issn = "0032-5910",
publisher = "Elsevier",

}

Systematic study of the effect of particle density distribution on the flow and performance of a dense medium cyclone. / Chen, Jiang; Chu, Kaiwei; Zou, Ruiping; Yu, Aibing; Vince, Andrew; Barnett, G. D.; Barnett, P. J.

In: Powder Technology, Vol. 314, 01.06.2017, p. 510-523.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Systematic study of the effect of particle density distribution on the flow and performance of a dense medium cyclone

AU - Chen, Jiang

AU - Chu, Kaiwei

AU - Zou, Ruiping

AU - Yu, Aibing

AU - Vince, Andrew

AU - Barnett, G. D.

AU - Barnett, P. J.

PY - 2017/6/1

Y1 - 2017/6/1

N2 - Dense medium cyclone (DMC) is widely used to upgrade run-of-mine coal in modern coal preparation plants. The flow within it is very complicated, with multi-phases involved including air, water, coal and magnetic/non-magnetic particles of different sizes, densities and other properties. In this work, the effect of coal particle density distribution, one of the most important variables and highly related to coal type, is systematically studied using a combined approach of Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM). In particular, the so called Johnson's SB function, which can describe a wide range of distributions, is employed to represent different particle density distributions. For a given density range, the function is characterized by two parameters: median particle density ρ0.5 and distribution parameter σj, with the latter describes the spread of the distribution. The effects of the two parameters on the flow and performance of a typical DMC are quantified. Moreover, their implication to practical operation, e.g. when the amount of near gravity material is high, is discussed. The results are also analysed in terms of the medium and particle flow fields, particle-fluid, particle-particle and particle-wall interaction forces to understand the fundamentals of the operation. The results obtained in this work should be useful to the design and control of DMC operations with different coal density distributions or coal types.

AB - Dense medium cyclone (DMC) is widely used to upgrade run-of-mine coal in modern coal preparation plants. The flow within it is very complicated, with multi-phases involved including air, water, coal and magnetic/non-magnetic particles of different sizes, densities and other properties. In this work, the effect of coal particle density distribution, one of the most important variables and highly related to coal type, is systematically studied using a combined approach of Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM). In particular, the so called Johnson's SB function, which can describe a wide range of distributions, is employed to represent different particle density distributions. For a given density range, the function is characterized by two parameters: median particle density ρ0.5 and distribution parameter σj, with the latter describes the spread of the distribution. The effects of the two parameters on the flow and performance of a typical DMC are quantified. Moreover, their implication to practical operation, e.g. when the amount of near gravity material is high, is discussed. The results are also analysed in terms of the medium and particle flow fields, particle-fluid, particle-particle and particle-wall interaction forces to understand the fundamentals of the operation. The results obtained in this work should be useful to the design and control of DMC operations with different coal density distributions or coal types.

KW - Dense medium cyclone

KW - Particle density distribution

KW - Discrete element method

KW - Computational fluid dynamics

KW - Coal preparation

U2 - 10.1016/j.powtec.2016.11.041

DO - 10.1016/j.powtec.2016.11.041

M3 - Article

VL - 314

SP - 510

EP - 523

JO - Powder Technology

JF - Powder Technology

SN - 0032-5910

ER -