Processes for recovery of metals from coal ash

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:6356942

Gilliam, T M; Canon, R M; Watson, J S

Two objetives were the treatment of the ash to remove and isolate metals in salable form and to produce innucuous wastes. Economic analyses were performed on the most promising approaches using available design data. The most feasible approach is direct leaching with hydrochloric acid. Treatment of 1 million tons of dry ash/y by this process indicates that a capital investment of $42.5 x 10/sup 6/ would be required with a yearly net cash flow of $15.2 x 10/sup 6/. The payout period would be 2.8 y, indicating that further investigation is warranted. Results of experiments on the leach indicate that all metals available to environmental release can be removed, with 88% of the ash remaining for disposal as innocuous waste. 2 figures, 4 tables.

• OSTI ID: 6356942
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
AEROSOL WASTES
ASHES
CAPITALIZED COST
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COST
DISSOLUTION
ECONOMIC ANALYSIS
ECONOMICS
ELEMENTS
ENERGY SOURCES
FEASIBILITY STUDIES
FLY ASH
FOSSIL FUELS
FUELS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INCOME
INORGANIC ACIDS
LEACHING
MANAGEMENT
MATERIALS
MATERIALS RECOVERY
METALS
OPERATING COST
OXIDATION
PROCESSING
RECOVERY
RESIDUES
SEPARATION PROCESSES
TECHNOLOGY ASSESSMENT
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE PRODUCT UTILIZATION
WASTES