A novel technique for evaluating cleaned fine and ultrafine coal. Final technical report, 1 September 1991--31 August 1992
- Southern Illinois Univ., Carbondale, IL (United States)
The increasing demand for cleaner coals requires that coals be crushed to fine ({minus}100 mesh--0.15 mm) and ultrafine ({minus}325 mesh--0.045 mm) sizes to liberate more of the fine-grained mineral matter including pyrite. However, such small coal particles can not be analyzed in the standard washability analysis. The purpose of this study is to develop a washability analysis system for fine and ultrafine coal particles using Density Gradient Centrifugation (DGC) and Thermal Gravimetric Analysis (TGA) techniques. The main conclusion of this project is that it has clearly been demonstrated that the density gradient centrifugation process can be used to generate usable washability data on fine and ultrafine coals. Specific conclusions are: (1) A single DGC run gives all twelve density fractions (at 0.05 gm/ml increments) for a washability analysis of a single size fraction; (2) Recovery from the DGC runs is usually sufficient for ash and sulfur analysis; (3) DGC washability analysis can be used to define the limits of washability and to screen coals for ultrafine use.
- Research Organization:
- Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
- DOE Contract Number:
- FG22-91PC91334
- OSTI ID:
- 10117770
- Report Number(s):
- DOE/PC/91334-T140; ON: DE94005741; BR: AV0100000
- Resource Relation:
- Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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