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Title: Engineering analysis and comparison of new processes for the recovery of resource materials from coal ash

Abstract

During the past 2 years, several promising new processes for the recovery of valuable resource materials from coal ash, primarily power plant fly ash, have been conceived and investigated at the Oak Ridge National Laboratory. These processes, which include direct acid leach, the salt-soda sinter process, and the Calsinter (CaSo/sub 4/-CaCO/sub 3/) process, are designed to remove the major metals (aluminum, iron, and titanium) from fly ash; however, some are also capable of recovering trace metals. The sintering processes are particularly efficient in metal recovery and perhaps can produce nonhazardous solid wastes, as defined by the Resource Conservation and Recovery Act. The salt-soda sinter process can recover 95% of the aluminum and 90% of the iron and titanium while producing a solid containing mostly silicates similar to silica gel. The Calsinter process recovers approximately the same amounts of the metals and produces solids similar to plaster of Paris. This process is particularly attractive because it can consume large amounts of flue-gas desulfurization (FGD) sludge as well as fly ash. Engineering and preliminary cost analyses have been prepared for these processes (and the lime-soda sinter process) for a plant consuming one million tons of fly ash (dry basis) per year. Amore » comparison of strengths and weaknesses of the various processes is presented.« less

Authors:
; ;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
OSTI Identifier:
6432874
Report Number(s):
CONF-790205-3
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Conference
Resource Relation:
Conference: 5. international ash utilization symposium, Atlanta, GA, USA, 25 Feb 1979
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 01 COAL, LIGNITE, AND PEAT; ALUMINIUM; RECOVERY; FLY ASH; WASTE PRODUCT UTILIZATION; IRON; TITANIUM; FEASIBILITY STUDIES; CHEMICAL COMPOSITION; COMPARATIVE EVALUATIONS; RAW MATERIALS; SODIUM CARBONATES; SODIUM CHLORIDES; AEROSOL WASTES; ALKALI METAL COMPOUNDS; CARBON COMPOUNDS; CARBONATES; CHLORIDES; CHLORINE COMPOUNDS; ELEMENTS; HALIDES; HALOGEN COMPOUNDS; METALS; OXYGEN COMPOUNDS; SODIUM COMPOUNDS; TRANSITION ELEMENTS; WASTES; 320305* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management; 010800 - Coal, Lignite, & Peat- Waste Management

Citation Formats

Canon, R M, Seeley, F G, and Watson, J S. Engineering analysis and comparison of new processes for the recovery of resource materials from coal ash. United States: N. p., 1979. Web.
Canon, R M, Seeley, F G, & Watson, J S. Engineering analysis and comparison of new processes for the recovery of resource materials from coal ash. United States.
Canon, R M, Seeley, F G, and Watson, J S. 1979. "Engineering analysis and comparison of new processes for the recovery of resource materials from coal ash". United States.
@article{osti_6432874,
title = {Engineering analysis and comparison of new processes for the recovery of resource materials from coal ash},
author = {Canon, R M and Seeley, F G and Watson, J S},
abstractNote = {During the past 2 years, several promising new processes for the recovery of valuable resource materials from coal ash, primarily power plant fly ash, have been conceived and investigated at the Oak Ridge National Laboratory. These processes, which include direct acid leach, the salt-soda sinter process, and the Calsinter (CaSo/sub 4/-CaCO/sub 3/) process, are designed to remove the major metals (aluminum, iron, and titanium) from fly ash; however, some are also capable of recovering trace metals. The sintering processes are particularly efficient in metal recovery and perhaps can produce nonhazardous solid wastes, as defined by the Resource Conservation and Recovery Act. The salt-soda sinter process can recover 95% of the aluminum and 90% of the iron and titanium while producing a solid containing mostly silicates similar to silica gel. The Calsinter process recovers approximately the same amounts of the metals and produces solids similar to plaster of Paris. This process is particularly attractive because it can consume large amounts of flue-gas desulfurization (FGD) sludge as well as fly ash. Engineering and preliminary cost analyses have been prepared for these processes (and the lime-soda sinter process) for a plant consuming one million tons of fly ash (dry basis) per year. A comparison of strengths and weaknesses of the various processes is presented.},
doi = {},
url = {https://www.osti.gov/biblio/6432874}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}

Conference:
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