Rheology of coal-water slurries prepared by the HP roll mill grinding of coal. Quarterly technical progress report, September 1, 1994--November 30, 1994
Technical Report
·
OSTI ID:10122230
The objective of this research is the development of improved technology for the preparation of coal-water slurries than have potential for replacing fuel oil in direct combustion. This should be of major importance to the United States in its efforts to reduce dependence on imported oil and to rely more on its enormous low-cost coal resources. In accordance with this objective, in the first stage of this project, considerable work has been conducted in the initial stage to standardize experimental procedures for sample preparation, grinding and rheological measurements. For this purpose, Pittsburgh No. 8 bituminous coal was dry ground in a ball mill for preparing coal-water slurries. In order to find a suitable sensor system for the rheological measurements of coal-water slurries, the authors have tested a Haake RV-12 viscometer with MV-II, MV-SP, MV-DIN, and TSV-DIN sensor systems on coal-water slurries containing 60% solids. The results indicated that the Haake RV-12 viscometer with a MV-DIN sensor system gives more reproducible results. The results obtained in investigation of the effect of particle size and solids content on the rheological behavior of the slurries showed that at the same shear rate, both the shear stress and viscosity of the slurries increase as the mean diameter of the particles decreases, and that the viscosity of the slurries increases as the solids content is increased.
- Research Organization:
- California Univ., Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-92PC92526
- OSTI ID:
- 10122230
- Report Number(s):
- DOE/PC/92526--T9; ON: DE95007992
- Country of Publication:
- United States
- Language:
- English
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