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Coal Preparation

Estimation of Steady State and Dynamic Dense Medium Cyclone Performance

Coal Preparation » Gravity Separation

Published: November 20Project Number: C16043

Get ReportAuthor: Andrew Vince, Aibing Yu | Elsa Consulting Group Pty Ltd, University of New South Wales

Please note that the simulator that forms part of this report is no longer available - Should you choose to continue with the purchase of this report we are not in a position to provide the simulation tool referenced and referred to within the report.

 

While the yearly reports produced for this project are published, the primary outcome was the PC/laptop based DMC Simulator of which Version 1 is supplied when you download/purchase (select get report) the project reports.  

ACARP does not maintain the full version of the software.

Abstract

An objective of this ACARP project was to develop a user-friendly PC based DMC Simulator to facilitate the general application of the simplified formulation derived from detailed modelling work.

The overall aim of this project is to understand and model, on a particle scale, the complex multiphase

flow and separating performance of dense medium cyclone (DMC) and classifying cyclone (CC) units

widely used in the Australian coal industry.

The key findings and conclusions obtained from this project were:

· A CFD-DEM model has been developed and used to study the effect of M:C ratio fluctuation at the inlet of a DMC.

· A CFD-DEM model has been developed and used to predict the wear locations and rate in a DMC. The "groove" wear pattern observed in practice can be predicted by the approach. It is predicted that the severe wear locations are the inside wall of the spigot and the outside wall of the vortex finder.

· the user-friendly PC based DMC Simulator is further developed and validated to facilitate engineering application.

· a computer model has been developed to simulate the gas-liquid-solid flow in a CC, where Reynolds stress model (RSM) is used to describe the anisotropic turbulence flow and mixture multiphase model to determine the interface between air and fluid and motion of particles with different sizes/densities. The applicability of this approach has been verified by the good agreement between the calculated and measured flow fields and separation efficiency. The model has been used to study CC performance related to flowing three variables: feed solid percentage (from 0-25% by volume) in the coal slurry, different CC wear profiles, and feed solid fluctuation.

The PC based DMC Simulator, which is formulated based on the data from fundamental simulations

and describes the performance of DMCs as a function of a range of geometrical, material and

operational variables, is now being tried/used free by ACARP Levy contributors. Two such simulators

were formulated: one is a standalone package and the other is MS Excel based.

Note that the model was developed primarily as a research tool to allow a fundamental understanding of

dense medium cyclone operation to be derived via specific case studies. It is not suitable for use by

non-specialist personnel.

Only version 1 of the simulator is available through ACARP.

Please note that the simulator that forms part of this report is no longer available - Should you choose to continue with the purchase of this report we are not in a position to provide the simulation tool referenced and referred to within the report.

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