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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 process, called Calsinter. In this process, fly ash is sintered with added CaSO/sub 4/ and CaCO/sub 3/ at 1200/sup 0/C and the sinter product is subsequently leached with 4 N H/sub 2/SO/sub 4/. Results of experiments using Calsinter show that aluminum recovery increases with the sintering temperature in the range 800 to 1200/sup 0/C and exceeds 95% at the optimum sintering conditions. An attractive feature of the process is that flue gas desulfurization sludge 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 by including a solvent extraction step, which provides primarily for the recovery of a pure A1/sub 2/O/sub 3/ product. In addition, this process provides for effective management of potentially hazardous materials (e.g., Ba, As, Hg, Cd, Se, Cr, Pb, and Ag) so that the resulting waste is more environmentally stable than the original waste materials.

Authors:
;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
OSTI Identifier:
6611135
Report Number(s):
ORNL/TM-7613
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ALUMINIUM; MATERIALS RECOVERY; FLY ASH; SINTERING; WASTE PROCESSING; IRON; MANGANESE; THORIUM; TITANIUM; URANIUM; ALUMINIUM OXIDES; BENCH-SCALE EXPERIMENTS; DESULFURIZATION; EXPERIMENTAL DATA; FLUE GAS; POLLUTION CONTROL; SLUDGES; SOLVENT EXTRACTION; TEMPERATURE DEPENDENCE; WASTE PRODUCT UTILIZATION; ACTINIDES; AEROSOL WASTES; ALUMINIUM COMPOUNDS; ASHES; CHALCOGENIDES; CHEMICAL REACTIONS; DATA; ELEMENTS; EXTRACTION; FABRICATION; GASEOUS WASTES; INFORMATION; MANAGEMENT; METALS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PROCESSING; RECOVERY; RESIDUES; SEPARATION PROCESSES; TRANSITION ELEMENTS; WASTE MANAGEMENT; WASTES; 010800* - Coal, Lignite, & Peat- Waste Management; 320305 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management

Citation Formats

Felker, L K, and Seeley, E G. Chemical development of the Calsinter process for recovering resource materials from fly ash. United States: N. p., 1981. Web.
Felker, L K, & Seeley, E G. Chemical development of the Calsinter process for recovering resource materials from fly ash. United States.
Felker, L K, and Seeley, E G. 1981. "Chemical development of the Calsinter process for recovering resource materials from fly ash". United States.
@article{osti_6611135,
title = {Chemical development of the Calsinter process for recovering resource materials from fly ash},
author = {Felker, L K and Seeley, E 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 process, called Calsinter. In this process, fly ash is sintered with added CaSO/sub 4/ and CaCO/sub 3/ at 1200/sup 0/C and the sinter product is subsequently leached with 4 N H/sub 2/SO/sub 4/. Results of experiments using Calsinter show that aluminum recovery increases with the sintering temperature in the range 800 to 1200/sup 0/C and exceeds 95% at the optimum sintering conditions. An attractive feature of the process is that flue gas desulfurization sludge 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 by including a solvent extraction step, which provides primarily for the recovery of a pure A1/sub 2/O/sub 3/ product. In addition, this process provides for effective management of potentially hazardous materials (e.g., Ba, As, Hg, Cd, Se, Cr, Pb, and Ag) so that the resulting waste is more environmentally stable than the original waste materials.},
doi = {},
url = {https://www.osti.gov/biblio/6611135}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {5}
}

Technical Report:
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