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Title:
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Round robin study CCSEM analysis for slagging experiments [ECN-C--94-049]
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Author(s):
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Published by:
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Publication date:
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ECN
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1995
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ECN report number:
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Document type:
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ECN-C--94-049
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ECN publication
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Number of pages:
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Full text:
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21
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Download PDF
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Abstract:
The principal aim of this study is to perform an inter-laboratorycomparison of the Computer Controlled Scanning Electron Microscopy (CCSEM)
method for automated analysis of coal minerals. Factors other than instrument
quality and settings were to a great deal eliminated by the following
approach: the analyses were performed on identical samples by all
participants; and the number of particles in each size class was as nearly as
possible the same for each analysis run. The coal samples analyzed were
Illinois no. 6, Pittsburgh no. 8, and Prince. The analysis data comprise: a
listing of the SEM-EDX spectrographic X-ray analysis for about 1000 particles
each in the size classes: >10 mum, 3-10 mum and <3 mum., and the volume
percentages of the mineral species quartz, kaolinite, pyrite and calcite.
Apart from responding to the main objective, the exercise was used to develop
a new programme for mineral group classification to replace the black-box
Coal Minerals Analysis (CMA) programme. The advantage of the new system over
CMA is its flexibility, which permits the introduction of various mineral
definitions. In fouling and slagging research, for example, an open
classification system can be tuned to ash compositions that are of particular
interest. 1 fig., 1 tab., 1 appendix, 10 refs.
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