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

Technical Report · Mon Mar 01 04:00:00 EST 1982

OSTI ID:5412555

Burnet, G; Dunker, J W; Murtha, M J

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
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
ACTIVATION ENERGY
AEROSOL WASTES
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ARRHENIUS EQUATION
ASHES
CARBON COMPOUNDS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLORINATION
COAL PREPARATION
COMMINUTION
DISPERSIONS
DISSOLUTION
ENERGY
EQUATIONS
FABRICATION
FLY ASH
HALOGENATION
HEAVY MEDIA SEPARATION
IRON COMPOUNDS
IRON ORES
IRON OXIDES
KINETICS
LEACHING
LIMESTONE
MAGNETITE
MINERALS
MIXTURES
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
RECOVERY
RESIDUES
RESOURCE POTENTIAL
ROCKS
SEDIMENTARY ROCKS
SEPARATION PROCESSES
SINTERING
SODIUM CARBONATES
SODIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
USES
WASTE PRODUCT UTILIZATION
WASTES