skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Recovery of aluminum and other metal values from fly ash

Abstract

The invention described herein relates to a method for improving the acid leachability of aluminum and other metal values found in fly ash which comprises sintering the fly ash, prior to acid leaching, with a calcium sulfate-containing composition at a temperature at which the calcium sulfate is retained in said composition during sintering and for a time sufficient to quantitatively convert the aluminum in said fly ash into an acid leachable form.

Inventors:
;
Publication Date:
OSTI Identifier:
6494465
Patent Number(s):
US 4252777
Assignee:
Department of Energy
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 1 Nov 1979; Other Information: PAT-APPL-090175
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ALUMINIUM; MATERIALS RECOVERY; FLY ASH; RECYCLING; WASTE PROCESSING; CALCIUM SULFATES; LEACHING; SINTERING; AEROSOL WASTES; ALKALINE EARTH METAL COMPOUNDS; ASHES; CALCIUM COMPOUNDS; DISSOLUTION; ELEMENTS; FABRICATION; MANAGEMENT; METALS; OXYGEN COMPOUNDS; PROCESSING; RECOVERY; RESIDUES; SEPARATION PROCESSES; SULFATES; SULFUR COMPOUNDS; WASTE MANAGEMENT; WASTES; 010800* - Coal, Lignite, & Peat- Waste Management; 320305 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management

Citation Formats

McDowell, W J, and Seeley, F G. Recovery of aluminum and other metal values from fly ash. United States: N. p., 1981. Web.
McDowell, W J, & Seeley, F G. Recovery of aluminum and other metal values from fly ash. United States.
McDowell, W J, and Seeley, F G. Tue . "Recovery of aluminum and other metal values from fly ash". United States.
@article{osti_6494465,
title = {Recovery of aluminum and other metal values from fly ash},
author = {McDowell, W J and Seeley, F G},
abstractNote = {The invention described herein relates to a method for improving the acid leachability of aluminum and other metal values found in fly ash which comprises sintering the fly ash, prior to acid leaching, with a calcium sulfate-containing composition at a temperature at which the calcium sulfate is retained in said composition during sintering and for a time sufficient to quantitatively convert the aluminum in said fly ash into an acid leachable form.},
doi = {},
url = {https://www.osti.gov/biblio/6494465}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {2}
}