Process for the recovery of alumina from fly ash

Title: Process for the recovery of alumina from fly ash

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Abstract

An improvement in the lime-sinter process for recovering alumina from pulverized coal fly ash is disclosed. The addition of from 2 to 10 weight percent carbon and sulfur to the fly ash-calcium carbonate mixture increase alumina recovery at lower sintering temperatures.

Inventors:: Murtha, M.J.

Issue Date:: 1983-08-09

OSTI Identifier:: 7159468

Patent Number(s):: 4397822 A

Application Number:: PPN: US 6-424703

Assignee:: PTO; EDB-94-121146

DOE Contract Number:: W-7405-ENG-82

Resource Type:: Patent

Resource Relation:: Patent File Date: 27 Sep 1982

Country of Publication:: United States

Language:: English

Subject:: 01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; ALUMINIUM OXIDES; MATERIALS RECOVERY; FLY ASH; ADDITIVES; CALCIUM CARBONATES; LIME-SODA SINTER PROCESS; OPTIMIZATION; AEROSOL WASTES; ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; ASHES; CALCIUM COMPOUNDS; CARBON COMPOUNDS; CARBONATES; CHALCOGENIDES; COMBUSTION PRODUCTS; MANAGEMENT; OXIDES; OXYGEN COMPOUNDS; PROCESSING; RESIDUES; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; 010800* - Coal, Lignite, & Peat- Waste Management; 200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions

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                    Murtha, M.J. Process for the recovery of alumina from fly ash.  United States: N. p., 1983. 
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                    Murtha, M.J. Process for the recovery of alumina from fly ash.  United States.

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                    Murtha, M.J. Tue .  
        "Process for the recovery of alumina from fly ash".  United States.

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@article{osti_7159468,

  title        = {Process for the recovery of alumina from fly ash},

  author       = {Murtha, M.J.},

  abstractNote = {An improvement in the lime-sinter process for recovering alumina from pulverized coal fly ash is disclosed. The addition of from 2 to 10 weight percent carbon and sulfur to the fly ash-calcium carbonate mixture increase alumina recovery at lower sintering temperatures.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1983},

  month        = {8}

}

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An improvement in the lime-sinter process for recovering alumina from pulverized coal fly ash is disclosed. The addition of from 2 to 10 weight percent carbon and sulfur to the fly ash-calcium carbonate mixture increase alumina recovery at lower sintering temperatures.
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