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Title: Chemical development of the Calsinter process for recovering resource materials from fly ash

Abstract

Laboratory-scale tests of several methods for the recovery of resource materials from fly ash have led to the development of a sinter/dilute acid leach method (Calsinter process) in which fly ash is sintered with CaSO/sub 4/ and CaCO/sub 3/ at 1200/sup 0/C followed by a leach with 4 N H/sub 2/SO/sub 4/. Aluminum recovery, using this process, increased with the sintering temperature in the range 800 to 1200/sup 0/C and exceeded 95% at the optimum sintering conditions. An attractive feature of the process is that flue gas desulfurization sludge (FGDS) can be substituted for CaSO/sub 4/ without reduction of the metal values recovery. Other resource materials such as Fe, Ti, Mn, U, and Th can also be recovered when this process is coupled with a solvent extraction step, which provides for the recovery of a pure Al/sub 2/O/sub 3/ product. In addition, potentially hazardous materials such as Ba, As, Hg, Cd, Se, Cr, Pb, and Ag can be managed in a way that will render the waste from the process more environmentally stable than the original waste materials.

Authors:
;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
Sponsoring Org.:
USDOE
OSTI Identifier:
5952007
Report Number(s):
CONF-790917-9
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Conference
Resource Relation:
Conference: American Chemical Society national meeting, Washington, DC, USA, 10 Sep 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; CALCIUM CARBONATES; CALCIUM SULFATES; CHEMICAL COMPOSITION; FLOWSHEETS; IRON; LEACHING; MANGANESE; SCRUBBERS; SINTERING; SLUDGES; THORIUM; TITANIUM; URANIUM; ACTINIDES; AEROSOL WASTES; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CARBON COMPOUNDS; CARBONATES; DIAGRAMS; DISSOLUTION; ELEMENTS; EQUIPMENT; FABRICATION; METALS; OXYGEN COMPOUNDS; POLLUTION CONTROL EQUIPMENT; SEPARATION PROCESSES; SULFATES; SULFUR COMPOUNDS; TRANSITION ELEMENTS; WASTES; 320305* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management; 010800 - Coal, Lignite, & Peat- Waste Management

Citation Formats

Felker, L. K., and Seeley, F. G. Chemical development of the Calsinter process for recovering resource materials from fly ash. United States: N. p., 1979. Web.
Felker, L. K., & Seeley, F. G. Chemical development of the Calsinter process for recovering resource materials from fly ash. United States.
Felker, L. K., and Seeley, F. G. 1979. "Chemical development of the Calsinter process for recovering resource materials from fly ash". United States. https://www.osti.gov/servlets/purl/5952007.
@article{osti_5952007,
title = {Chemical development of the Calsinter process for recovering resource materials from fly ash},
author = {Felker, L. K. and Seeley, F. G.},
abstractNote = {Laboratory-scale tests of several methods for the recovery of resource materials from fly ash have led to the development of a sinter/dilute acid leach method (Calsinter process) in which fly ash is sintered with CaSO/sub 4/ and CaCO/sub 3/ at 1200/sup 0/C followed by a leach with 4 N H/sub 2/SO/sub 4/. Aluminum recovery, using this process, increased with the sintering temperature in the range 800 to 1200/sup 0/C and exceeded 95% at the optimum sintering conditions. An attractive feature of the process is that flue gas desulfurization sludge (FGDS) can be substituted for CaSO/sub 4/ without reduction of the metal values recovery. Other resource materials such as Fe, Ti, Mn, U, and Th can also be recovered when this process is coupled with a solvent extraction step, which provides for the recovery of a pure Al/sub 2/O/sub 3/ product. In addition, potentially hazardous materials such as Ba, As, Hg, Cd, Se, Cr, Pb, and Ag can be managed in a way that will render the waste from the process more environmentally stable than the original waste materials.},
doi = {},
url = {https://www.osti.gov/biblio/5952007}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {9}
}

Conference:
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