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
- Resource Relation:
- Conference: 3. annual advanced gasification projects contractors meeting, Morgantown, WV, USA, 28 Jun 1983; Other Information: Portions are illegible in microfiche products
- 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
ALUMINIUM OXIDES
PHASE DIAGRAMS
CALCIUM OXIDES
SILICA
SLAGS
VISCOSITY
ASHES
CHEMICAL COMPOSITION
CORRELATIONS
EXPERIMENTAL DATA
LIGNITE
SUBBITUMINOUS COAL
TEMPERATURE DEPENDENCE
VERY HIGH TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
BROWN COAL
CALCIUM COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
DATA
DIAGRAMS
ENERGY SOURCES
FOSSIL FUELS
FUELS
INFORMATION
MATERIALS
MINERALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
RESIDUES
SILICON COMPOUNDS
SILICON OXIDES
010600* - Coal
Lignite
& Peat- Properties & Composition