Flue gas desulfurization chemistry studies: limestone grindability. Volume 2. Grindability testing. Final report
The results of a study to determine the relative grindability of US limestones and to relate grindability to petrographic properties are presented in this report. A laboratory ball mill test was developed to provide a quick and simple measure of grindability. These values were then used to explore possible correlations between grindability and the chemical and physical properties of the limestones. Chemical analyses and thin section petrographic analyses were used to characterize the limestone samples. The results of the laboratory ball mill test were compared to the results of an industrial grinding test, the Bond Work Index, for six samples which covered the grindability range. The two tests compared well with a correlation coefficient greater than 0.9. While the laboratory test is not sufficient to provide ball mill design specifications, it can be used as a screening and quality control test. The grinding results, expressed as a grindability index, ranged in values from 2 to 15. This represents a seven-fold range in the relative difficulties to grind for the limestones tested. From the petrographic analysis results, a strong correlation was found between the grindability and the fraction of macrocrystalline (> 5 ..mu..m) carbonate minerals present in the limestone. However, based on the high degree of variability characteristic of most limestone deposits, petrographic information should, in general, only be used to qualitatively predict the grindability of a specific limestone. An actual grinding test is recommended for a quantitative evaluation.
- Research Organization:
- Radian Corp., Austin, TX (USA)
- OSTI ID:
- 6625196
- Report Number(s):
- EPRI-CS-3618-Vol.2; ON: TI84920521
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FLUE GAS
DESULFURIZATION
LIMESTONE
COMPARATIVE EVALUATIONS
GRINDING
MICROSCOPY
X-RAY DIFFRACTION
CORRELATIONS
EXPERIMENTAL DATA
FOSSIL-FUEL POWER PLANTS
LEACHING
LIME-LIMESTONE WET SCRUBBING PROCESSES
PETROGRAPHY
SAMPLING
SCRUBBERS
CARBONATE ROCKS
CHEMICAL REACTIONS
COHERENT SCATTERING
COMMINUTION
DATA
DIFFRACTION
DISSOLUTION
EQUIPMENT
GASEOUS WASTES
INFORMATION
MACHINING
NUMERICAL DATA
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
ROCKS
SCATTERING
SCRUBBING
SEDIMENTARY ROCKS
SEPARATION PROCESSES
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions