ACARP ACARP ACARP ACARP
Coal Preparation

Dry Beneficiation of Coal by Laser Sorting

Coal Preparation » General

Published: September 97Project Number: C6050

Get ReportAuthor: Ted Lewis | Callide Coalfields

The project was designed to demonstrate on a pilot scale, the technical viability of the laser based sorting process to coal cleaning. The project was managed by Callide coalfields with Barco Machine Vision Systems (Elbicon Pacific Pty Ltd), supplying and operating the processing unit. Financial support was obtained from Shell Coal and ACARP.

The project tested five different types of feed, in size ranges between 9.5mm and 75mm, at feed rates up to 32 tph. An open day of demonstrating the process was attended by industry representatives from a wide range of interests. The main conclusions were:-

1. The project demonstrated that laser sorting as designed by Barco Machine Vision Systems, is a technically viable process for the separation of coal and impurities.

2. The process offers a tool towards the development of deposits in remote and/or arid areas.

3. The process offers substantial advantages:

  • little to no water required, eliminates the expensive auxiliary circuits
  • Simplicity, only screening and conveying are involved
  • Dry processing maintains/improves energy content of product.
  • Minimal manning requirements
  • Operating cost can be expected to be lower than for wet processing of the same size ranges.
  • Reduced environmental impact.

4. The process needs to be 'tuned' for each coal, however, changes from on type of coal to another can be almost instantaneous, once the program for each type has been developed.

5. The optimum size for best performance indicated by the tests was >25mm. On sizes below 25mm better performance than shown by the tests is expected to be achievable with more refined tuning of system parameters. This was not possible in the limited time available for the trials.

6. Performance on very high ash, high reject content feeds was especially good, indicating a role for cleaning up high ash coarse material which is often discarded in most mines.

A number of observations relevant to the development and application of the process were also recorded, together with suggestions for future work.

The report was submitted in two volumes. Volume 1 is the main report and contains details of the equipment, the test procedure, summary of results and conclusions. Volume 2 contains the project proposal, and all the laboratory results sheets for every sampling run taken in the project, and will be of limited interest.

Underground

Health and safety, productivity and environment initiatives.

Underground

Open Cut

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

Recently Completed Projects

C19024Establishing Ecologically Sustainable Mine Water Release Criteria In Seasonally Flowing Streams

Extreme rainfall conditions in the Fitzroy Catchment over an approxi...

C25030Coal Mine Open Pit Final Void Closure And Relinquishment - Addressing Uncertainty In Coal Mine Environmental Planning

This report addresses uncertainties faced by coal mine operators whe...

C27046Estimation Of True Deformation Vector From Slope Radar Monitoring

Slope deformation radar monitors are now widely used in open cut coa...

Open Cut

Coal Preparation

Maximising throughput and yield while minimising costs and emissions.

Recently Completed Projects

C27004Improving Coal Flotation With Oscillatory Air Supply

This report provides detailed information on coal flotation with os...

C25018Improving Solids Recovery And Moisture Reduction In Ultrafine Coal Dewatering

This report provides detailed information on fine coal dewatering in...

C27028Lab Froth Flotation Testing Guide With Coal Quality

Correct outcomes from laboratory froth flotation testing in coal bor...

Coal Preparation

Technical Market Support

Market acceptance and emphasising the advantages of Australian coals.

Recently Completed Projects

C26039Nanoporosity In Cokes: Their Origin, Control And Influence On CO2 Reactivity

This project using the outcomes of previous project C24060, examine...

C28063A Comprehensive Technical Review Of High-Efficiency Low-Emission (HELE) Pulverised Coal Combustion Technologies For Power Generation

Research and development has been undertaken worldwide to realise co...

C28064Carbon Structure Transformation During Coking Of Australian Coking Coals: Better Understanding The Coke Formation

Carbon structures of coke that are formed during the plastic layer a...

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) - Phase 2 Demonstration In A Packed Bed Reactor

An alternative approach to high temperature oxidation of ventilation...

C26004CFD Modelling Of Reverse Thermal Oxidisers For VAM Abatement - CFD Modelling Of Fixed-Bed RTO Devices

The project is part of a larger multi‐phase program of study a...

C27058Technological Assessment Of A Recycle Reactor For VAM Abatement

Underground coal mining emits high volumes of methane, diluted in ve...

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