Coal Preparation

Lab Froth Flotation Testing Guide with Coal Quality

Coal Preparation » General

Published: August 20Project Number: C27028

Get ReportAuthor: Chris McMahon | McMahon Coal Quality Resources

Correct outcomes from laboratory froth flotation testing in coal borecore exploration are critical to resource predictive potential, market evaluation and economic mining outcomes.

McMahon Coal Quality Resources (MCQR) has observed over many projects that froth flotation outcomes produced have incorrectly represented resource potential for product ash and yield - the resource then being misrepresented from misleading data. This has occurred through ineffective application of Australian Standard methods in particular relating to methodology variants (including reduction of minimum mass increments) and required reagent dosages (that may be different for each deposit and require trial and error stages that are often not easily attainable in borecore testing), and stage one / initial “no reagent flotation” that can be less effectual where lesser number of increments than required by Australian Standards are utilised. That is, modified tree flotation methods.

The objective of this project was to collate and evaluate data attained in froth flotation across several deposits to define effective methodology and reagent dosages. MCQR had attained flotation data utilising trial and error of various modified tree flotation methods and other methods. This project was aimed at defining best methods from those studies and relating those outcomes to coal quality. Coal quality parameters evaluated were mean maximum vitrinite reflectance (coal rank) and ash value of the froth flotation size tested - the latter being referred to throughout this report as the 'raw froth size ash'.

Froth flotation data sets were collated, and accumulated froth flotation data sets reviewed. Charts were created and outcomes and conditions of testing assessed for most and least successful modified froth flotation outcomes based on yield / product ash relationships, and comparison against ultimate flotation testing.

The outcomes of the project were the definition of the best outcome modified froth flotation method based generally on Australian Standards methods, definition of effective reagent dosages, an outcomes guide for different raw froth size ash outcomes, though on less increments than recommended by the Australian Standard.  Australian Standard froth flotation methods were also reviewed and suggestions made for better of a modified froth flotation method based on the outcomes. This is thought to benefit the industry by providing more accurate froth flotation outcomes, save time and money in processing and reduce ambiguity in testing and outcomes.


Health and safety, productivity and environment initiatives.

Recently Completed Projects

C34019Longwall Bretby Cable Handling Monitoring With Fibre Optics

This project examined the potential of using fibre optic sensing tec...

C28028The Inclusion Of High Interest Native Plants In Mine Site Restoration Programs: Propagation, Translocation And Field Re-Introduction

This report synthesises over 10 years of ex situ and in si...

C27049Mine Machine Radar Sensor Integration

The aim of this project was to develop an integrated radar sensor an...


Open Cut

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

Recently Completed Projects

C34029Validation Of Laser Induced Breakdown Spectroscopy (LIBS) As A Rapidly Deployable Field Technology To Estimate Coal Quality

Rapid evaluation of a coal resource by in-situ characterisation dow...

C34028Guidelines For Assessment Of Geotechnically Safe And Stable Post-Mining Landforms

The purpose of this project was to develop a guidelines document as ...

C34016Elements In Coal – A Start-To-End Analysis

This project explores the fate and concentration potential of critical e...

Open Cut

Coal Preparation

Maximising throughput and yield while minimising costs and emissions.

Recently Completed Projects

C26016Determining The Benefits Of Online Thickener Underflow Rheology Measurements

The aim of this project is to determine how useful the rheology meas...

C33056Modelling And Control Of Classifying Cyclones

Hydrocyclones are one of the key technologies for the classification...

C28056Surface Alloying Of Centrifuge Baskets And Sieve Bends Screen Surfaces To Increase The Service Lifetime

The main objective of this project was to improve the wear resistanc...

Coal Preparation

Technical Market Support

Market acceptance and emphasising the advantages of Australian coals.

Recently Completed Projects

C33066Washability And Distribution Of Sulfur And Trace Elements For Different Size And Density Fractions Of Raw Coals

Based on the hypothesis that the levels of sulfur and other toxic tr...

C34060In-Situ Investigation Of Coke Structure Formation Under Stamp Charged Coking Conditions

Stamp charged cokemaking has emerged as an effective technique to im...

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...

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


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