Advanced research and technology, direct utilization: recovery of minerals from coal fly ash. Fossil energy program. Technical progress report, 1 October 1980-31 December 1980
The purpose of this research is to develop methods to process fly ash for the separation and use of an iron-rich fraction, for the recovery of metals, primarily Al and Ti, and for use of the process residues. Research during this report period of the HiChlor process for the extraction of alumina and titania by high-temperature chlorination of a fly ash-reductant mixture included investigation of the simulation of the reactions as a design tool, the assembly of a unit to measure reaction kinetic rates and particle specific surface areas and porosities, and the design of equipment to measure necessary chloride product separation data. A pretreatment chlorination reaction using CO and Cl/sub 2/ was found to be capable of removing 80% of the iron with only minimal alumina and silica reaction. Development of the lime-soda sinter process includes the collection of data on the phenomenon of auto-disintegration of lime-fly ash sinters. Results indicate that it is the presence of minor constituents having +5 pr +6 valence cations of a size that can enter the lattice of the calcium silicate which prevent sinter auto-disintegration.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6400569
- Report Number(s):
- IS-4773; ON: DE81025523
- Country of Publication:
- United States
- Language:
- English
Similar Records
Direct utilization: recovery of minerals from coal fly ash. Fossil Energy program. Technical progress report, 1 January-30 March 1980
Direct utilization-recovery of minerals from coal fly ash. Fossil Energy Program. Technical progress report, 1 October 1979-31 December 1979
Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ALUMINIUM OXIDES
MATERIALS RECOVERY
FLY ASH
SEPARATION PROCESSES
HICHLOR PROCESS
IRON OXIDES
LIME-SODA SINTER PROCESS
SINTERING
CHEMICAL REACTIONS
TITANIUM OXIDES
CALCIUM SILICATES
CATIONS
CHLORINATION
DESIGN
REMOVAL
SIMULATION
VALENCE
AEROSOL WASTES
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ASHES
CALCIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
FABRICATION
HALOGENATION
IONS
IRON COMPOUNDS
MANAGEMENT
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
RESIDUES
SILICATES
SILICON COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management