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Maceral/microlithotype analysis of the progressive grinding of a Central Appalachian high-volatile bituminous coal blend

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Abstract

The petrographic composition of sized coal produced through the progressive grinding of a Central Appalachian high-volatile bituminous coal blend was analyzed for multiple sets either by removing fine, −200-mesh, coal after each test iteration or by retaining the fine coal in progressive test fractions. With prolonged grinding, coarser fractions tend to become depleted in vitrinite and vitrinite-rich microlithotypes, leading to progressively harder-to-grind coal remaining in the oversize, +200-mesh, fractions. The latter trend is shown both by the maceral and microlithotype composition of the coal and by the increased slope and fractal dimension of size-frequency distribution, implying an increase in hardness and resistance to grinding of the oversize coal.

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Authors and Affiliations

  1. Department of Agricultural Engineering, University of Kentucky, Lexington, KY, USA

    A. S. Trimble (student)

  2. University of Kentucky Center for Applied Energy Research, Lexington, KY, USA

    J. C. Hower (senior petrologist)

Authors
  1. A. S. Trimble
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  2. J. C. Hower
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Trimble, A.S., Hower, J.C. Maceral/microlithotype analysis of the progressive grinding of a Central Appalachian high-volatile bituminous coal blend. Mining, Metallurgy & Exploration 17, 234–243 (2000). https://doi.org/10.1007/BF03403240

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  • DOI: https://doi.org/10.1007/BF03403240

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