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.
| Original language | English |
|---|---|
| Article number | 99-302 |
| Pages (from-to) | 234-243 |
| Number of pages | 10 |
| Journal | Minerals and Metallurgical Processing |
| Volume | 17 |
| Issue number | 4 |
| State | Published - Nov 2000 |
Keywords
- Coal
- Grinding
- Macerals
- Macrolithotype analysis
- Petrology
ASJC Scopus subject areas
- Control and Systems Engineering
- General Chemistry
- Geotechnical Engineering and Engineering Geology
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry