Abstract
Coal Grain Analysis (CGA) measures the maceral grain types in individual particles, not just as an overall maceral distribution. Such information is extremely informative to understanding how individual particles behave in coal preparation, and provides a fundamental understanding of practical requirements for liberation of ‘clean’ coal. Atkinson et al. (2012) reported on a new project that utilised CGA to predict CPP feed washability at 50 mm topsize. At that stage, only two coal types had been evaluated. The results obtained by this project show that the technique is, as a minimum, successful for predicting CPP feed washability for each coal type (each mine lease). This paper provides an update on the CGA Washability Prediction project, including information on reproducibility of the CGA analysis itself and its impact on CGA washability prediction. CGA reproducibility is contrasted with published reproducibility for float and sink determinations.
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References
Atkinson, B., Swanson, A., Warren, K., & O’Brien, G., 2012, “CPP feed washability determination from small topsize samples” in Proc. 14th Australian Coal Preparation Conference, Mathewson, D. (Ed), Australian Coal Preparation Society, Canberra, Paper 7A, pp202-218
Atkinson, B., 2015, “Impact of Sample Preparation Procedure on CGA Result”, ACARP Project C23042 Final Report, Australian Coal Association
O’Brien, G., Firth, B., Warren K., & Hapugoda, P., 2013a, “Improved understanding of coal exploration samples by coal grain analysis”, ACARP Project C20040 Final Report, Australian Coal Association
O’Brien, G., Firth, B., Warren, K., Hapugoda, P., 2013b, “Analysis of Borecore Samples by Coal Grain Analysis to Provide Yield and Chemistry Estimates at Different Ash Values.” Proc. XVII International Coal Preparation Congress (ICPC), Istanbul, Turkey, pp65-71
Ofori, P., O’Brien, G., Hapugoda, P. and Firth, B., 2013, “Distributed flotation kinetics models – a new implementation approach for coal flotation”, Proc. Flotation 2013, Cape Town, South Africa, 18-21 November
Acknowledgements
The authors sincerely acknowledge the foresight of ACARP in continuing to support this fundamental research. Sites which have contributed samples and treatment costs to the research program are also gratefully acknowledged.
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© 2016 Springer International Publishing Switzerland
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Atkinson, B., Swanson, A. (2016). Further Developments in Washability Prediction Using CGA. In: Litvinenko, V. (eds) XVIII International Coal Preparation Congress. Springer, Cham. https://doi.org/10.1007/978-3-319-40943-6_11
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DOI: https://doi.org/10.1007/978-3-319-40943-6_11
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