Advanced research and technology: direct utilization-recovery of minerals from coal fly ash. Fossil energy program. Technical progress report, 1 April-30 June 1980
The purpose of this investigation is to develop methods to utilize coal fly ashes through processes for the extraction of alumina and titania, and for the separation and utilization of an iron-rich fraction. Research of the HiChlor process for the extraction of alumina and titania by high-temperature chlorination of a fly ash-reductant mixture has involved comparative calculations for several fly ashes, and the design of a bench-scale fluidized chlorination system. The initial chlorination research of the high-volume fly ashes from western coals was begun. Process development of the sinter process for alumina recovery has included the investigation of several variables for improving the quantity and quality of the alumina extracted from sintered materials. As a result of this work, it is clear that further optimization of the sintering and extraction variables is required for commercialization of the fly ash sinter process. Iron-rich, magnetically separated coal fly ash particles were beneficiated to a quality equal to high grade, naturally mined iron ore by a high-temperature pressurized caustic treatment. About 95% of the contained silica and 65% of the alumina was extracted. Work was begun on the assembly of equipment for a detailed comparison of magnetically separated iron-rich fly ashes and commercial magnetities for use in heavy media coal beneficiation. Characterization of the particles, ad stability and rheological properties of media solutions prepared with these materials will provide data for further evaluating magnetic fly ash as a heavy media material. A circuit is also being built for long-term flow tests of the media suspensions for measurement of construction material erosion and solid medium particle friability.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6697451
- Report Number(s):
- IS-4751
- 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, 1 October 1978-30 September 1979
Direct utilization: recovery of minerals from coal fly ash. Fossil Energy program. Technical progress report, 1 January-30 March 1980
Related Subjects
010800 -- Coal
Lignite
& Peat-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
AEROSOL WASTES
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON
CARBON COMPOUNDS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHLORINATION
CHLORINE
COAL PREPARATION
COMMINUTION
CONCENTRATORS
DATA
ECONOMICS
ELECTRON MICROSCOPY
ELEMENTS
EXPERIMENTAL DATA
FABRICATION
FLUIDIZED BED
FLY ASH
HALOGENATION
HALOGENS
HEAVY MEDIA SEPARATION
INFORMATION
IRON COMPOUNDS
IRON OXIDES
LIMESTONE
MAGNETIC SEPARATORS
MICROSCOPY
MOLDING
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PELLETIZING
PERFORMANCE TESTING
RECOVERY
REDUCING AGENTS
ROCKS
SEDIMENTARY ROCKS
SEPARATION PROCESSES
SINTERING
SODIUM CARBONATES
SODIUM COMPOUNDS
TESTING
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
USES
WASTE PRODUCT UTILIZATION
WASTES