Actions for Direct utilization : recovery of minerals from coal fly ash. Fossil Energy Program. Technical progress report, 1 July 1982-30 September 1982

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Direct utilization : recovery of minerals from coal fly ash. Fossil Energy Program. Technical progress report, 1 July 1982-30 September 1982

Author
Burnet, G.
Published
United States : [publisher not identified], 1983
Springfield, Va.: National Technical Information Service, [approximately 1983]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Murtha, M. J.

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Summary
Research during the past year has dealt primarily with the fundamentals of the HiChlor process, development of the sintering process, utilization of the fly ash iron-rich fraction, and application of the work to date to the full range of coal conversion solid wastes. Work on the chlorination of coal fly ash to extract metal constituents (HiChlor process) included both chlorination reaction studies and efforts to recover and purify the chloride products. The reaction research comprised an evaluation of several reduction and chlorination agents, the development of techniques for the collection of reaction kinetic data in a form not limited by mass transfer of the reactants, and the use of a fused salt reactor for fly ash chlorination. Chlorination in a fused salt reactor shows promise of providing improved selectivity in the reaction of the metal oxides present and of significantly increasing the reaction rate. A ternary amine organic solvent has been used to extract the Fe ions from an aqueous HCl solution of mixed metal chlorides, followed by precipitation of the Al as AlCl/sub 3/.6H/sub 2/O and extraction of the titanium ions using tributyl phosphate. Sinter research on coal fly ash, cement kiln dust, and coal refuse sinter mixtures has shown that soluble aluminates can be extracted from ground clinker formed by sintering at 1200/sup 0/C. Work has also been conducted on the magnetic separation of an iron-rich fraction from coal fly ash in a water slurry, and on the use of the iron-rich fraction as heavy medium material in coal beneficiation.
Report Numbers
DE83016796; IS-4823
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: W-7405-ENG-82
OSTI Identifier 6035881
Research organization: Ames Lab., IA (USA).
View MARC record | catkey: 47334777