Fluidization characteristics of power-plant fly ashes and fly ash-charcoal mixtures. [MS Thesis; 40 references]
As a part of the continuing research on aluminum recovery from fly ash by HiChlor process, a plexiglass fluidization column system was constructed for measurement of fluidization parameters for power-plant fly ashes and fly ash-charcoal mixtures. Several bituminous and subbituminous coal fly ashes were tested and large differences in fluidization characteristics were observed. Fly ashes which were mechanically collected fluidized uniformly at low gas flow rates. Most fly ashes which were electrostatically precipitated exhibited channeling tendency and did not fluidize uniformly. Fluidization characteristics of electrostatically collected ashes improve when the finely divided charcoal powder is added to the mixture. The fluidization of the mixture was aided initially by a mechanical stirrer. Once the fluidization had succeeded, the beds were ready to fluidize without the assistance of a mechanical action. Smooth fluidization and large bed expansion were usually observed. The effects of charcoal size and aspect ratio on fluidization characteristics of the mixtures were also investigated. Fluidization characteristics of a fly ash-coal mixture were tested. The mixture fluidized only after being oven-dried for a few days.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 5604125
- Report Number(s):
- IS-T-880
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
Similar Records
Advanced research and technology. Direct utilization: recovery of minerals from coal fly ash. Technical progress report, July 1, 1981-September 30, 1981. [HiChlor and sintering processes]
Modification of coal fly ash size distribution. Semiannual technical progress report No. 1, August 1, 1980-January 31, 1981
Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
FLY ASH
FLUIDIZATION
WASTE PRODUCT UTILIZATION
ALUMINIUM
CHLORINATION
FOSSIL-FUEL POWER PLANTS
RECOVERY
AEROSOL WASTES
CHEMICAL REACTIONS
ELEMENTS
HALOGENATION
METALS
POWER PLANTS
THERMAL POWER PLANTS
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management