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Coking Properties Deterioration in Small Samples

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Published: June 19Project Number: C26034

Get ReportAuthor: Chris McMahon | McMahon Coal Quality Resources

Accurate evaluation of coking coal parameters at the exploration stage is critical to a coal's marketability and sale price and accurate estimation of coal resource and reserves.  The measurement of a coals coking potential is known to deteriorate with time and under different physical conditions for different coal types.  Borecore samples with small sample mass more quickly deteriorate in coking properties than other physical samples such as stream/belt (product) samples, bulk samples or stockpile samples and are thus critical to planning.

An earlier project C10055 Coal Fluidity, Stockpiling and Coke Quality defined effects on stockpiles and this project defines similar effects for small samples / borecores with different storage conditions which approximate true laboratory practice.

Critical coking tests were evaluated at the small sample stage with determination of the effects of time and other physical conditions (storage techniques).

The outcome of this project was to provide recommendations on estimating/quantifying deterioration effects via devised methods based on the data and the Researcher's prior observations and in relation to mode of sample storage.

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