Mineral classification revisited: use of quasiternary diagrams in the visualization of compositional distribution of inorganic material in coal
- University of Oulu, Oulu (Finland). Department of Chemistry
A comparative study to determine the elemental composition of individual inorganic particles in the Pittsburgh No. 8 coal sample has been carried out with two different magnifications by SEM-EDS. The classification of particles into mineral classes left 30-40% of the particles unclassified. It was deduced that the sample contained the following minerals: calcite, kaolinite, pyrite, quartz, apatite, muscovite, and montmorillonite. The information of the compositional distribution of inorganic material in the coal sample is enhanced by use of the quasiternary diagrams. Minerals, such as apatite, calcite, pyrite, and quartz, can clearly be identified from the quasiternary diagram. A suitable elemental definition of the three corners in the quasiternary diagram enables the discussion of the compositional distribution and identity of the inorganic material that remains unclassified in the mineral classification. By combining the information from mineral classification and quasiternary diagrams, the composition of the inorganic material of the coal sample can be understood. This information can be used in the prediction of ash-related problems regardless of the fuel type. 50 refs., 6 figs., 2 tabs.
- OSTI ID:
- 20741011
- Journal Information:
- Energy and Fuels, Vol. 20, Issue 2; Other Information: Risto.Laitinen@oulu.fi; ISSN 0887-0624
- Country of Publication:
- United States
- Language:
- English
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