ACARP ACARP ACARP ACARP
Coal Preparation

Improving the Treatment of Clay Minerals in Coal Flotation in Saline Water

Coal Preparation » Fine Coal

Published: January 17Project Number: C23038

Get ReportAuthor: Xumeng Chen and Yongjun Peng | The University of Queensland

Clay minerals commonly occur in Australian coal deposits and have deleterious effects on coal flotation. Firstly, clay minerals can adsorb on coal particles as slime coatings and reduce coal surface hydrophobicity, resulting in a lower combustible recovery. In addition, clay minerals can be recovered through mechanical entrainment due to their ultrafine particle size and the formation of network structures, which increases the ash content of flotation products. In the previous ACARP project C20024, several methodologies were developed to mitigate the deleterious effect of clay minerals on coal flotation in saline water, and one promising approach for reducing slime coatings was to apply structured non-ionic triblock copolymers as dispersants to remove clay slime coatings. The objective of this ACARP project was to identify the behaviour of the triblock copolymers in plant settings and determine its benefits to plant operations.

 

Paired t-test design was used for trials in two coal preparation plants. Before each plant trial, the standard deviation of historical data was used to estimate the number of tests required for detecting the required improvement after applying the triblock copolymer. Each plant trial was conducted following the sequential pairs design. Each pair of tests was composed of a normal condition without the addition of reagent and a trial condition with the addition of reagent. The difference between normal condition and trial condition in each pair of tests was calculated and the data collected during the whole plant trial was analyzed by t-tests to generate a conclusion with a given confidence level.

 

Cost-benefit analysis of applying the triblock copolymer in the two CHPP sites was conducted using discounted cash flow analysis followed by sensitivity analysis. Net Present Value (NPV) was calculated based on the current operating conditions and coal sale prices and the project life of ten years. The calculation showed positive NPV for both sites, AUD 4.8 million in Plant A and AUD 31.3 million in plant B. The NPV is sensitive to the coal price and plant feed throughput.

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