Detoxification and generation of useful products from combustion wastes
Objectives of this research were to find optimum mixtures of flyash, bottom ash, and flue gas desulfurization sludge (DSG) that can be hardened through a pozzolanic reaction into a flyash or ettringite cement that will have high strength and low leachability of heavy metals. Specific goals are: to study the hardness of mixtures of flyash, bottom ash, and DSG treated with lime and other hardening agents; to determine the optimum solids content, setting time, moisture content, and post setting treatments that will yield the greatest strength and hardness out of these mixtures; and to determine the leachability of the synthetic material as a measure of its ability to retain absorbed and/or entrained toxic metals. Flyash, bottom ash, and DSG from Ohio Edison, flyash and bottom ash from the White Bluff Power Plant of Arkansas Power and Light, and flyash obtained from a Tennessee Valley Authority power plant were obtained. The DSG slurry was decanted and the settled solids scooped out of the bucket and placed in an oven where they were dried at approximately 60{degree}C for 48 hours. This resulted in a porous, blocky material which could be ground very rapidly in a pulverizer. After drying and pulverizing, the samples were stored in buckets. An initial set of 120 tests of hardening agents using mixtures of lime, lime plus calcium chloride, lime plus aluminium sulfate, lime plus aluminum sulfate plus sodium silicate in combination with flyash, bottom ash, and DSG and mixtures of flyash, bottom ash and DSG were carried out. Results are described.
- Research Organization:
- Arkansas Tech Univ., Russellville, AR (USA). Arkansas Mining and Mineral Resources Research Inst.
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FG22-88PC88910
- OSTI ID:
- 6924105
- Report Number(s):
- DOE/PC/88910-4; ON: DE90010920
- Country of Publication:
- United States
- Language:
- English
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01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
ASHES
SOLIDIFICATION
WASTE PRODUCT UTILIZATION
FLY ASH
FOSSIL-FUEL POWER PLANTS
WASTE MANAGEMENT
GYPSUM
ALUMINIUM SULFATES
CALCIUM CHLORIDES
CEMENTS
CHEMICAL COMPOSITION
DESULFURIZATION
LIMESTONE
MIXTURES
PROGRESS REPORT
SODIUM SILICATES
AEROSOL WASTES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CALCIUM SULFATES
CARBONATE ROCKS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
DOCUMENT TYPES
HALIDES
HALOGEN COMPOUNDS
MANAGEMENT
MATERIALS
MINERALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POWER PLANTS
RESIDUES
ROCKS
SEDIMENTARY ROCKS
SILICATES
SILICON COMPOUNDS
SODIUM COMPOUNDS
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
THERMAL POWER PLANTS
WASTES
200200* - Fossil-Fueled Power Plants- Waste Management
010800 - Coal
Lignite
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360603 - Materials- Properties