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Title: Advanced research and technology: direct utilization-recovery of minerals from coal fly ash. Technical progress report, 1 October 1978-30 September 1979

Abstract

Research focused on technical development of promising methods for recovering minerals from power plant fly ash. Development of the high-temperature (HiChlor) gas chlorination process and refinement and definition of the recovery steps of extraction and desilication for the lime-soda sinter process were emphasized. A preliminary design and cost estimate for commercialization of the HiChlor process and a proposal for a process development unit for scale-up of the lime-soda sinter process were prepared. Both physical and chemical beneficiation techniques to upgrade the iron content of the magnetic fly ash were tested; chemical beneficiation using high-temperature NaOH leaching was found to be the most effective method. Pretreatment for each of the processes includes magnetic separation of coal fly ash. Bituminous coal fly ashes contain magnetic iron oxide particles which can be removed by magnetic separation. The magnetic material consists primarily of iron oxides, with small amounts of silica and alumina. Removal of additional silica and alumina will give a product which can be used for steel production. Physical investigations included careful study of internal structure of fly ash particles. Fly ash samples were separated for a range of electromagnetic power settings and the fractions were analyzed for size determinations, chemical compositions, andmore » morphological contents. Chemical analyses showed that, for the nonmagnetic fly ash fractions, the silica and iron contents are independent of size, and that the alumina content is highest in the smaller particles.« less

Authors:
;
Publication Date:
Research Org.:
Ames Lab., IA (USA)
OSTI Identifier:
5602680
Report Number(s):
IS-4720
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ALUMINIUM OXIDES; MATERIALS RECOVERY; FLY ASH; WASTE PRODUCT UTILIZATION; IRON OXIDES; TITANIUM OXIDES; CHEMICAL REACTORS; CHLORINATION; FEASIBILITY STUDIES; FOSSIL-FUEL POWER PLANTS; MAGNETIC SEPARATORS; MINERALS; AEROSOL WASTES; ALUMINIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; CONCENTRATORS; HALOGENATION; IRON COMPOUNDS; MANAGEMENT; OXIDES; OXYGEN COMPOUNDS; POWER PLANTS; PROCESSING; RECOVERY; THERMAL POWER PLANTS; 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

Citation Formats

Burnet, G, and Murtha, M. Advanced research and technology: direct utilization-recovery of minerals from coal fly ash. Technical progress report, 1 October 1978-30 September 1979. United States: N. p., 1980. Web.
Burnet, G, & Murtha, M. Advanced research and technology: direct utilization-recovery of minerals from coal fly ash. Technical progress report, 1 October 1978-30 September 1979. United States.
Burnet, G, and Murtha, M. 1980. "Advanced research and technology: direct utilization-recovery of minerals from coal fly ash. Technical progress report, 1 October 1978-30 September 1979". United States.
@article{osti_5602680,
title = {Advanced research and technology: direct utilization-recovery of minerals from coal fly ash. Technical progress report, 1 October 1978-30 September 1979},
author = {Burnet, G and Murtha, M},
abstractNote = {Research focused on technical development of promising methods for recovering minerals from power plant fly ash. Development of the high-temperature (HiChlor) gas chlorination process and refinement and definition of the recovery steps of extraction and desilication for the lime-soda sinter process were emphasized. A preliminary design and cost estimate for commercialization of the HiChlor process and a proposal for a process development unit for scale-up of the lime-soda sinter process were prepared. Both physical and chemical beneficiation techniques to upgrade the iron content of the magnetic fly ash were tested; chemical beneficiation using high-temperature NaOH leaching was found to be the most effective method. Pretreatment for each of the processes includes magnetic separation of coal fly ash. Bituminous coal fly ashes contain magnetic iron oxide particles which can be removed by magnetic separation. The magnetic material consists primarily of iron oxides, with small amounts of silica and alumina. Removal of additional silica and alumina will give a product which can be used for steel production. Physical investigations included careful study of internal structure of fly ash particles. Fly ash samples were separated for a range of electromagnetic power settings and the fractions were analyzed for size determinations, chemical compositions, and morphological contents. Chemical analyses showed that, for the nonmagnetic fly ash fractions, the silica and iron contents are independent of size, and that the alumina content is highest in the smaller particles.},
doi = {},
url = {https://www.osti.gov/biblio/5602680}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

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