Fossil energy program. I. Mining research and development: coal preparation and analysis. I. Advanced research and technology development. Technical progress report, 1 April-30 June 1979
Progress is reported in: coal preparation and analysis (microstructure of coal, selective enhancement of magnetic susceptibility of pyrite in coal by dielectric heating, rapid analysis of mineral content of coals (on-line monitoring instrument for pyrite and ash in coal), and coal blending experiments). Developmental research of the chlorination and sintering processes for recovery of minerals from coal fly ash was continued. Low temperature, 500 to 700/sup 0/C, chlorination of fly ashes and of oxide mixtures shows that iron oxide is much more reactive than alumina at these temperatures and hence can be removed preferentially. Investigation of the lime-soda sinter process revealed that the sintering reactions occur by solid phase diffusion of the reacting oxides. For mixtures of lime, silica, and alumina, homogeneous products resulted after sintering for two hours at 1350/sup 0/C. Fly ash magnetic separation tests using a range of electromagnet power settings show that with increased power the mass of the magnetic fraction increases but the average iron content in this fraction decreases. Nonmagnetic fraction fly ash samples were divided into size fractions by a settling technique. Results of the analyses of these fractions indicate that the alumina concentration is highest in the small size fractions; silica and iron oxide concentrations are more independent of size. Design and operation of the chlorination reactor in the HiChlor process will be influenced by these results.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 5518006
- Report Number(s):
- IS-4711
- Country of Publication:
- United States
- Language:
- English
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Advanced research and technology: direct utilization, recovery of minerals from coal fly ash. Fossil energy program. Technical progress report, July 1-September 30, 1980
Advanced research and technology direct utilization: recovery of minerals from coal fly ash. Fossil energy program technical progress report, 1 April 1981-30 June 1981
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ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ASHES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHLORINATION
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DISSOLUTION
ELECTRON MICROPROBE ANALYSIS
ENERGY SOURCES
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FOSSIL FUELS
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HALOGENATION
IRON COMPOUNDS
IRON OXIDES
IRON SULFIDES
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MICROANALYSIS
MICROSCOPY
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ORGANIC COMPOUNDS
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OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PYRITE
PYRITES
RECOVERY
REMOVAL
RESIDUES
SEPARATION PROCESSES
SINTERING
SULFIDES
SULFUR COMPOUNDS
SULFUR ORES
TRANSITION ELEMENT COMPOUNDS
WASTE PRODUCT UTILIZATION
WASTES