ACARP ACARP ACARP ACARP
Coal Preparation

Industrial Study of a Novel Dense Medium Cyclone at Gregory CHPP

Coal Preparation » Gravity Separation

Published: April 04Project Number: C11059

Get ReportAuthor: Richard Rong | JKMRC, University of Qld

Following the development of a novel dense medium cyclone at a pilot scale at the JKMRC, a 1000mm diameter large dense medium cyclone was designed and fabricated. The cyclone, called JKDMC, was tested at the Gregory Coal Handling and Preparation Plant over the period between 28 July and 29 August 2003.

An existing 1000mm DSM cyclone was replaced by the JKDMC, and was operated in parallel with another DSM cyclone in the same module. The two DMCs had similar inlet and O/F diameters, but a different U/F diameter.

The cyclone performance was assessed by two methods: density tracer tests and sampling. 10 density tracer tests were conducted using 32mm cubic tracers with narrow increments (0.01 RD). Tracer number for each density was 10 and 30 respectively, and the latter number delivered more accurate results. The Ep value was 0.006-0.008 for both DMCs.

Three sampling tests were carried out, two with the JKDMC using different vortex finders, and one with the DSM cyclone. In order to operate on a similar medium-to-coal ratio, as defined by the plant personnel, the feed pressure used for the tests was 80 kPa for the JKDMC and 100 kPa for the DSM cyclone. The pressure difference makes the performance assessment more difficult.

32mm tracer tests showed no difference between the two units. However, sampling tests showed that the JKDMC performance was poorer than that of the DSM cyclone on every size fraction. The Ep value on the entire size fraction (50-0.5mm) was 0.022 for the DSM and 0.043 and 0.035 for the JKDMC.

The major reason for the poor separation in the JKDMC was the lower feed pressure. The feed pressure of 80 kPa is just equivalent to 6.37D where D is the cyclone diameter, leading to a low density differential. Unfortunately, it was not possible to test the JKMRC at the required feed pressure of 9D at Gregory, due to insufficient pump capacity. Another possible reason for the poor performance was the inlet design of the JKDMC, which was different from the successful pilot one. The original consideration for the design was to ensure a large feed rate for the industry-sized cyclone; however, such a design may affect to some extent the centrifugal force.

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