ACARP ACARP ACARP ACARP
Technical Market Support

Fusibility of Coal Blends and Minerals in Coking

Technical Market Support » Metallurgical Coal

Published: April 19Project Number: C25049

Get ReportAuthor: Priyanthi Hapugoda, Merrick Mahoney, Graham O’Brien, Greg Krahenbuhl, Paul McPhee & Karryn Warren | CSIRO and The University of Newcastle

The CSIRO optical reflected light imaging CGA (Coal Grain Analysis) system was developed and enhanced with ACARP support to provide compositional information on individual coal grains for many studies across the coal chain from exploration and processing to utilization, and including environmental aspects. The output from this system provides a reflectance fingerprint on the maceral groups, and compositional information, particle density and ash value on each individual grain. This system also has the capability to identify the reflectance boundary between fusible and infusible inertinite in individual coal particles for Australian coking coals. When analyses are conducted on size fractions of coke oven feed coal (nominal top size of 4mm) the CGA results provide detailed information of the overall maceral and grain type composition of the entire sample and the size distribution of the macerals (including infusible and fusible organic inerts and minerals separately) and grain types and the association between macerals and minerals in the individual grains for the coke oven feed samples.

The objectives of this project were to enhance the CGA system and to use the system to:

  • Determine the relationship between rank and the fusible reflectance range for an additional six coals from different Australian coal basins;
  • Characterise coal blends;
  • Investigate the transformation of major minerals during Coking;
  • Validate the CGA analysis of standard petrographic samples to determine the fusible and infusible constituents.

During project C21059, the CGA system was used to analyse matched coal and coke halves to determine the fusible reflectance range for six Australian coking coals of different ranks. These results showed that the reflectance range for the fusible inertinite was greatest for the lowest rank coals and decreased with increasing rank. The first goal of this project was to analyse an additional six Australian coals using the same methodology, increasing the total number of samples to twelve, which allowed us to confirm the relationship between the fusible inertinite reflectance range and coal rank identified during C21059.

The second project goal was to modify the CGA system to analyse coal blends to provide:

  • Details on the overall size distribution of the coals in the blend;
  • Maceral and grain type abundances for the individual coals in simple blends; and
  • Breakdown of inertinite into fusible and infusible inertinite for each coal.

The third objective of the project was to investigate mineral transformation during coking and mineral interactions with the organic matrix by analysing the matching individual mineral grains in the coal and coke sample halves. This approach identified that the size and compositional transformation of minerals during the coking process is primarily based on the chemical composition of the original minerals and their associations with the organic material within the parent coal particles and in the resulting coke material. More work is, however, required to obtain a better understanding of the evolution of mineral phases and the mineral/maceral interactions that may have occurred during coking.

Underground

Health and safety, productivity and environment initiatives.

Recently Completed Projects

C27010A Clinical, Radiological And Occupational Review Of Coal Mine Dust Lung Disease In Queensland

The aim of this project was to review recently diagnosed cases of Co...

C26061The Young’S Moduli, Poisson’S Ratios And Poroelastic Coefficients Of Coals

This report describes the measurement of coal (and rock) properties ...

C24015 Assessment Of Convergence Based Roof Support Design For Longwall Abutment Loads

The aim of Stage two of project C24015 was to develop a roof support...

Underground

Open Cut

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

Recently Completed Projects

C23029Alternative And Sustainable Explosive Formulations To Eliminate Nitrogen Oxide Emissions

This technical report describes the technology of a novel mining exp...

C25005Site Based Trials Of Alternative Explosive Formulations To Eliminate Nitrogen Oxide Emissions

This report documents the outcomes of Phase 3 of this project and b...

C26022Real-Time Prediction Of Coal Top Through Guided Borehole Radar Wave Imaging For Open Cut Blast-Hole Drilling

Damage to the tops of coal seams caused by incorrect blast stand-off...

Open Cut

Coal Preparation

Maximising throughput and yield while minimising costs and emissions.

Recently Completed Projects

C26015Novel Characterisation Of Coal Petrography For Improving The Dewatering Of Fine Coals Using Chemicals

This project aimed to develop alternatives to existing mechanical de...

C26014Low Cost Online Measurement Of Particle Size And Density For Diagnostics Across The Fine Coal Circuit

This project has developed a novel prototype optical system for prof...

C26008Implementation Of Oxidation Monitoring Tools And New Reagents In Plants To Improve The Flotation Of Oxidised Coals

Flotation of oxidized coals is a challenge confronting the Australia...

Coal Preparation

Technical Market Support

Market acceptance and emphasising the advantages of Australian coals.

Recently Completed Projects

C26045Mineralogy Effects On The 3D Porosity Evolution Of Coke And Coke Reactivity

CRI/CSR CO2 combustion data are key metrics of coke quality and perf...

C25049Fusibility Of Coal Blends And Minerals In Coking

The CSIRO optical reflected light imaging CGA (Coal Grain Analysis) ...

C25045Stage Two - Assessment Of In Situ High-Temperature Strength Of Cokes

Stage I of this project established a reliable and repeatable proces...

Technical Market Support

Mine Site Greenhouse Gas Mitigation

Mitigating greenhouse gas emissions from the production of coal.

Recently Completed Projects

C27008Selective Absorption Of Methane By Ionic Liquids

The connection of a ventilation air methane (VAM) abatement plant di...

C24061Proof-Of-Concept Photocatalytic Destruction Of Methane For Coal Mining Fugitive Emissions Abatement

Australia's fugitive emissions in 2015 were 41 Mt CO2-e (representin...

C23052Novel Stone Dust Looping Process For Ventilation Air Methane Abatement - Phase 3

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