Ash and slag characterization for low-rank coals
The viscosities of seventeen lignite and subbituminous coal ash slags have been measured in a reducing atmosphere over the temperature range of roughly 2100 to 2700/sup 0/F using a rotating bob viscometer. Recently published correlations of viscosity-temperature behavior with composition, developed in France for metallurgical slags, were tested using the low-rank coal ash slag composition data. One of these, the Urbain correlation, is based on the SiO/sub 2/-CAO-Al/sub 2/O/sub 3/ ternary phase diagram. The low-rank coal slags were subdivided into three groups, based on a parameter of the Urbain equation, roughly proportional to silica content. The Urbain equation, as modified to reflect subdivision by silica content, gave acceptable correlations (agreement of calculated and experimental viscosities within 30%) for 50% of the slags and marginally acceptable correlations (agreement within 60%) for 70% of the tests. 8 figures.
- Research Organization:
- North Dakota Univ., Grand Forks (USA). Energy Research Center
- DOE Contract Number:
- FC01-83FE60181
- OSTI ID:
- 6293120
- Report Number(s):
- DOE/FE/60181-9; CONF-830641-1; ON: DE83013245
- Country of Publication:
- United States
- Language:
- English
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Measurement and prediction of low-rank coal slag viscosity
Ash and slag characterization for low-rank coals
Related Subjects
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ASHES
BROWN COAL
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
COAL
CORRELATIONS
DATA
DIAGRAMS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
INFORMATION
LIGNITE
MATERIALS
MINERALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
RESIDUES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SLAGS
SUBBITUMINOUS COAL
TEMPERATURE DEPENDENCE
VERY HIGH TEMPERATURE
VISCOSITY