Recovery of aluminum and other metal values from fly ash

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

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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:

McDowell, William J ^[1]; Seeley, Forest G ^[1]

Oak Ridge, TN

Publication Date:: 1981-01-01

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 863810

Patent Number(s):: US 4252777

Assignee:: United States of America as represented by United States (Washington, DC)

DOE Contract Number:: W-7405-ENG-26

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: recovery; aluminum; metal; values; fly; ash; described; relates; method; improving; acid; leachability; found; comprises; sintering; prior; leaching; calcium; sulfate-containing; composition; temperature; sulfate; retained; time; sufficient; quantitatively; convert; acid-leachable; form; metal values; time sufficient; fly ash; calcium sulfate; comprises sintering; values found; /423/

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                    McDowell, William J, and Seeley, Forest G. Recovery of aluminum and other metal values from fly ash.  United States: N. p., 1981. 
        Web.

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                    McDowell, William J, & Seeley, Forest G. Recovery of aluminum and other metal values from fly ash.  United States.

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                    McDowell, William J, and Seeley, Forest G. Thu .  
        "Recovery of aluminum and other metal values from fly ash".  United States.  https://www.osti.gov/servlets/purl/863810.

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@article{osti_863810,

  title        = {Recovery of aluminum and other metal values from fly ash},

  author       = {McDowell, William J and Seeley, Forest 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/863810},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1981},

  month        = {1}

}

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Recovery of aluminum and other metal values from fly ash

Patent McDowell, W J ; Seeley, F G

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.
Recovery of aluminum and other metal values from fly ash

Patent McDowell, W J ; Seeley, F G

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