ACARP ACARP ACARP ACARP
Coal Preparation

Development of a process for separating and dewatering fine particles

Coal Preparation » Dewatering

Published: September 23Project Number: C29062

Get ReportAuthor: Anxiang Yang and Liguang Wang | The University of Queensland

Various beneficiation processes are employed for upgrading Australian raw coals over a broad size range. Among the beneficiation processes widely used in Australian coal preparation plants are dense medium separation and froth flotation. A common feature for these separators is the use of a lifting force (buoyancy force exerted on particles alone or particle-bubble aggregates) to allow lighter coal particles to move upward and denser mineral matter to move downward. A lifting force for particles in water can also be generated using acoustic waves, where these waves can exert radiation force on particles. The correlation of the acoustic radiation force with the size, density, and compressibility of the particles enables selective separation of particles according to their physical properties.

The aim of this work was to develop and evaluate a process based on acoustic particle manipulation for beneficiation of Australian raw coals at laboratory scale. We examined the potential of this process for upgrading coals of different sizes. The report provided detailed information on how machine design and operating variables would affect the particle separation efficiency.

A flow tubing system with an ultrasound transducer was designed and used to test the effectiveness of this beneficiation process for raw coals in the ultrafine and fine size fractions. Results show that coal particles can be manipulated by acoustic radiation force to form large aggregates and be trapped or floated in the water in the tubing. Good separation of coal particles from quartz particles using the designed separator was achieved, with high combustible recoveries being achievable over a broad size range tested. The acceleration of the sedimentation of coal particles in slurry for dewatering was also obtained using this device.

Underground

Health and safety, productivity and environment initiatives.

Recently Completed Projects

C27045Assessment Of Longwall Mining Induced Connective Fracturing

In underground mines the mining induced permeability change in the o...

C29007Innovative Coal Burst System To Investigate The Influence Of Confinement Loss And Pre-Conditioning On Coal Burst Mechanism

The challenges associated with designing and operating a safe and pr...

C28009Advanced Fracture Propagation Testing Of Coal Measure Rocks Under Dynamic Loading To Replicate Coal Burst Scenario

This project is aimed to address critical challenges regarding enhan...

Underground

Open Cut

Safety, productivity and the right to operate are priorities for open cut mine research.

Recently Completed Projects

C28035Topsoil Deficits In Site Rehabilitation Accelerated Transformation Of Spoils To Functional Soils

The incorporation of commercial biological amendments (compost, worm...

C34036Tyre Handler Testing Rig Stage 2: Lifting Trials

Tyre handling is a major source of risk in surface mining operations...

C29052Autonomous Water Pressure Sensors For Spoil Dumps And Dams

The geotechnical integrity and stability of a mine spoil dump or tai...

Open Cut

Coal Preparation

Maximising throughput and yield while minimising costs and emissions.

Recently Completed Projects

C28062Improving Operation And Control Of Centrifugal Dewatering Using A Novel Online Tool

Centrifugal dewatering is one of the main processes used for fine an...

C23045Full Scale Trial Of The REFLUX™ Flotation Cell

A 2 m diameter REFLUX Flotation Cell™ (RFC™) was install...

C34042Impact Of Water Quality In Coal Handling And Preparation Plants

This project evaluated water chemistry impacts on the corrosion rate...

Coal Preparation

Technical Market Support

Market acceptance and emphasising the advantages of Australian coals.

Recently Completed Projects

C34062Improving The Classification Of Microstructure Distribution In Coke CT Images Using Deep Learning And Lineal Path Calculations

This project builds on a number of earlier projects that have helped...

C29071Source Of Variability Of Reactivity Of Coke In The CSR Test

The Coke Strength after Reaction (CSR) test is used worldwide to det...

C33070Update Of Coal Dustiness And Dust Extinction Moisture (DEM) Standard AS4156.6

This project involved assessing the accuracy and precision of a prop...

Technical Market Support

Mine Site Greenhouse Gas Mitigation

Mitigating greenhouse gas emissions from the production of coal.

Recently Completed Projects

C28076Selective Absorption Of Methane By Ionic Liquids (SAMIL)

This third and final stage of this project was the culmination of a ...

C29069Low-Cost Catalyst Materials For Effective VAM Catalytic Oxidation

Application of ventilation air methane (VAM) thermal oxidiser requir...

C23052Novel Stone Dust Looping Process For Ventilation Air Methane Abatement

This multi‐phase project is concerned with the mitigation of m...

Mine Site Greenhouse Gas Mitigation

Low Emission Coal Use

Step-change technologies aimed at reducing greenhouse gas emissions.

Recently Completed Projects

C17060BGasification Of Australian Coals

Four Australian coals were trialled in the Siemens 5 MWth pilot scale ga...

C17060AOxyfuel Technology For Carbon Capture And Storage Critical Clean Coal Technology - Interim Support

The status of oxy-fuel technology for first-generation plant is indicate...

C18007Review Of Underground Coal Gasification

This report consists of a broad review of underground coal gasification,...

Low Emission Coal Use

Mining And The Community

The relationship between mines and the local community.

Recently Completed Projects

C16027Assessing Housing And Labour Market Impacts Of Mining Developments In Bowen Basin Communities

The focus of this ACARP-funded project has been to identify a number...

C22029Understanding And Managing Cumulative Impacts Of Coal Mining And Other Land Uses In Regions With Diversified Economies

The coal industry operates in the context of competing land-uses that sh...

C23016Approval And Planning Assessment Of Black Coal Mines In NSW And Qld: A Review Of Economic Assessment Techniques

This reports on issues surrounding economic assessment and analysis ...

Mining And The Community

NERDDC

National Energy Research,Development & Demonstration Council (NERDDC) reports - pre 1992.

Recently Completed Projects

1609-C1609Self Heating of Spoil Piles from Open Cut Coal Mines

Self Heating of Spoil Piles from Open Cut Coal Mines

1301-C1301Stress Control Methods for Optimised Development...

Stress Control Methods for Optimised Development and Extraction Operations

0033-C1356Commissioned Report: Australian Thermal Coals...

Commissioned Report: Australian Thermal Coals - An Industry Handbook

NERDDC