Advanced research and technology: direct utilization, recovery of minerals from coal fly ash. Fossil-Energy Program technical progress report, October 1, 1981-December 31, 1981
Research on the chlorination of alpha-alumina with CO and Cl/sub 2/ indicates that mass transfer limitations of the reaction can be minimized through use of the thin layer technique. Kinetic studies of the reaction indicate that it is first order with respect to both CO and Cl/sub 2/, and has an apparent activation energy of 13.35 kcal/mole. Preliminary results show that the chlorination of a leached Texas lignite fly ash with CO and Cl/sub 2/ is about 50 times slower than the chlorination of alpha-alumina. Work continues to explain this phenomenon. The development of sintering processes for alumina solubilization focuses on the collection of additional data for limestone-kiln dust-fly ash sinters, and for limestone-soda ash-fly ash sinters. These results more clearly describe the relationship between sinter mixture compositions and the extraction of high percentages of alumina. X-ray diffraction analysis techniques are also used to identify the compounds formed and to describe the sinter reaction mechanisms. Research conducted on the use of magnetically separated iron-rich fly ash as heavy medium material in coal beneficiation included: determination of the magnetic content of samples, a study of the effects of grinding on the stability of fly ash heavy media suspensions, measurement of corrosion and abrasion caused by flowing heavy media slurries, and measurement of the rheological properties of fly ash suspensions. Performance of suspensions of iron-rich fly ash and commercial magnetites is compared.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 5412555
- Report Number(s):
- IS-4793; ON: DE82018084
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Direct utilization: recovery of minerals from coal fly ash. Fossil Energy program. Technical progress report, 1 January-30 March 1980
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ALUMINIUM OXIDES
CHLORINATION
FLY ASH
CHEMICAL REACTION KINETICS
RESOURCE POTENTIAL
WASTE PRODUCT UTILIZATION
IRON OXIDES
USES
ACTIVATION ENERGY
ARRHENIUS EQUATION
DISSOLUTION
HEAVY MEDIA SEPARATION
LEACHING
LIMESTONE
MAGNETITE
MIXTURES
RECOVERY
SINTERING
SODIUM CARBONATES
AEROSOL WASTES
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ASHES
CARBON COMPOUNDS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL PREPARATION
COMMINUTION
DISPERSIONS
ENERGY
EQUATIONS
FABRICATION
HALOGENATION
IRON COMPOUNDS
IRON ORES
KINETICS
MINERALS
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
RESIDUES
ROCKS
SEDIMENTARY ROCKS
SEPARATION PROCESSES
SODIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management