Coal fly ash: a potential resource for aluminium and titanium
Two processes are described which utilize fly ash as a source of metals and by-products. The lime-soda sinter process involves sintering of the fly ash and alkaline oxides at 1100-1300/sup 0/C to break the alumina-silica bonds and form soluble aluminate compounds and insoluble calcium silicates. The aluminates are extracted from the sinter by dissolution in sodium carbonate. The calcium silicate sinter extract shows promise as a raw material for the manufacture of portland cement. The HiChlor process uses high temperature chlorination of fly ash in the presence of a reductant to form volatile metal chlorides of aluminium, titanium, iron, and silicon. The HiChlor process extracts aluminium, titanium, and iron, while the sinter process extracts only aluminium.
- Research Organization:
- Ames Lab., IA (USA); Iowa State Univ. of Science and Technology, Ames (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6670600
- Report Number(s):
- IS-M-298; CONF-800814-32
- Resource Relation:
- Conference: 180. American Chemical Society meeting/2. chemical congress of the North American Continent, Las Vegas, NV, USA, 24 Aug 1980
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ALUMINIUM
MATERIALS RECOVERY
FLY ASH
WASTE MANAGEMENT
WASTE PROCESSING
HICHLOR PROCESS
IRON
LIME-SODA SINTER PROCESS
TITANIUM
CALCIUM CARBONATES
CEMENTS
CHEMICAL COMPOSITION
CHLORINATION
COST
ECONOMIC ANALYSIS
FLOWSHEETS
HIGH TEMPERATURE
MAGNETIC SEPARATORS
RESOURCE RECOVERY FACILITIES
SINTERING
SODIUM CARBONATES
AEROSOL WASTES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTIONS
CONCENTRATORS
DIAGRAMS
ECONOMICS
ELEMENTS
ENERGY FACILITIES
FABRICATION
HALOGENATION
INDUSTRIAL PLANTS
MANAGEMENT
MATERIALS
METALS
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
SODIUM COMPOUNDS
TRANSITION ELEMENTS
WASTE PROCESSING PLANTS
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management