Direct utilization - recovery of minerals from coal fly ash. Technical progress report, January 1-March 31, 1982. [CO/Cl/sub 2/; C/Cl/sub 2/ and COCl]
Research on the chlorination of a leached Texas lignite fly ash has examined CO/Cl/sub 2/, C/Cl/sub 2/, and COCl/sub 2/ as reaction systems. Arrhenius plots suggest that there is a change in reaction mechanisms with increasing temperature in both the CO/Cl/sub 2/ and the C/Cl/sub 2/ systems. Reaction in the COCl/sub 2/ system appears to be limited by mass transfer, but this system has the highest initial reaction rates at lower temperatures of the systems studied. The research of coal fly ash sinter processes include the collection of limestone-soda ash sinter alumina extraction data using two additional fly ashes. A fly ash sample containing over 30 weight percent alumina was obtained from South Africa. This fly ash, which is the highest alumina content ash that has been investigated in this work, yielded, for optimum sinter mixture composition, over 90% alumina extraction. The other fly ash processed was a subbituminous fly ash of western coal which was obtained from the Ottumwa, Iowa, power station. This fly ash is very similar to other western coal fly ashes which have been investigated previously, but this ash is available locally and it will be used in the larger-scale sinter tests using the rotary kiln. Several tests were run investigating the desilication of extracted filtrates. Research has also been conducted on the magnetic separation of coal fly ash in a water slurry, and data are presented on the use of magnetically separated fly ash as heavy medium material in coal beneficiation.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6686894
- Report Number(s):
- IS-4803; ON: DE83003794
- Resource Relation:
- Other Information: Portions of document are illegible. Printed copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Advanced research and technology direct utilization: recovery of minerals from coal fly ash. Fossil energy program technical progress report, 1 April 1981-30 June 1981
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ALUMINIUM OXIDES
RECOVERY
FLY ASH
CHLORINATION
ARRHENIUS EQUATION
CALCIUM CARBONATES
EXPERIMENTAL DATA
FOSSIL-FUEL POWER PLANTS
LIGNITE
MAGNETIC SEPARATORS
RESOURCE POTENTIAL
SINTERING
SODIUM CARBONATES
SUBBITUMINOUS COAL
AEROSOL WASTES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ASHES
BROWN COAL
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
CONCENTRATORS
DATA
ENERGY SOURCES
EQUATIONS
FABRICATION
FOSSIL FUELS
FUELS
HALOGENATION
INFORMATION
MATERIALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POWER PLANTS
RESIDUES
SODIUM COMPOUNDS
THERMAL POWER PLANTS
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management