Dissolution and Separation of Aluminum and Aluminosilicates

McFarlane, Joanna; Benker, Dennis; DePaoli, David W.; Felker, Leslie Kevin; Mattus, Catherine H.

doi:10.1080/01496395.2014.975362

Title: Dissolution and Separation of Aluminum and Aluminosilicates

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Abstract

The selection of an aluminum alloy for target irradiation affects post-irradiation target dissolution and separations. Recent tests with aluminum alloy 6061 yielded greater than expected precipitation in the dissolver, forming up to 10 wt.% solids of aluminum hydroxides and aluminosilicates. Aluminosilicate dissolution presents challenges in a number of different areas, metals extraction from minerals, flyash treatment, and separations from aluminum alloys. We present experimental work that attempts to maximize dissolution of aluminum metal, along with silicon, magnesium, and copper impurities, through control of temperature, the rate of reagent addition, and incubation time. Aluminum phase transformations have been identified as a function of time and temperature, using X-ray diffraction. Solutions have been analyzed using wet chemical methods and X-ray fluorescence. Our data have been compared with published calculations of aluminum phase diagrams. Approaches are given to enhance the dissolution of aluminum and aluminosilicate phases in caustic solution.

Authors:

McFarlane, Joanna ^[1]; Benker, Dennis ^[1]; DePaoli, David W. ^[1]; Felker, Leslie Kevin ^[1]; Mattus, Catherine H. ^[1]

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

Publication Date:: Sat Dec 19 00:00:00 EST 2015

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1238002

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Separation Science and Technology

Additional Journal Information:: Journal Volume: 50; Journal Issue: 18; Journal ID: ISSN 0149-6395

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; aluminum alloy 6061; aluminum dissolution in caustic; plutonium for RTGs; aluminosilicate dissolution

Citation Formats


                    McFarlane, Joanna, Benker, Dennis, DePaoli, David W., Felker, Leslie Kevin, and Mattus, Catherine H. Dissolution and Separation of Aluminum and Aluminosilicates.  United States: N. p., 2015. 
Web.  doi:10.1080/01496395.2014.975362.

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                    McFarlane, Joanna, Benker, Dennis, DePaoli, David W., Felker, Leslie Kevin, & Mattus, Catherine H. Dissolution and Separation of Aluminum and Aluminosilicates.  United States.  https://doi.org/10.1080/01496395.2014.975362

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                    McFarlane, Joanna, Benker, Dennis, DePaoli, David W., Felker, Leslie Kevin, and Mattus, Catherine H. Sat .  
"Dissolution and Separation of Aluminum and Aluminosilicates".  United States.  https://doi.org/10.1080/01496395.2014.975362.  https://www.osti.gov/servlets/purl/1238002.

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@article{osti_1238002,

  title        = {Dissolution and Separation of Aluminum and Aluminosilicates},

  author       = {McFarlane, Joanna and Benker, Dennis and DePaoli, David W. and Felker, Leslie Kevin and Mattus, Catherine H.},

  abstractNote = {The selection of an aluminum alloy for target irradiation affects post-irradiation target dissolution and separations. Recent tests with aluminum alloy 6061 yielded greater than expected precipitation in the dissolver, forming up to 10 wt.% solids of aluminum hydroxides and aluminosilicates. Aluminosilicate dissolution presents challenges in a number of different areas, metals extraction from minerals, flyash treatment, and separations from aluminum alloys. We present experimental work that attempts to maximize dissolution of aluminum metal, along with silicon, magnesium, and copper impurities, through control of temperature, the rate of reagent addition, and incubation time. Aluminum phase transformations have been identified as a function of time and temperature, using X-ray diffraction. Solutions have been analyzed using wet chemical methods and X-ray fluorescence. Our data have been compared with published calculations of aluminum phase diagrams. Approaches are given to enhance the dissolution of aluminum and aluminosilicate phases in caustic solution.},

  doi          = {10.1080/01496395.2014.975362},

  journal      = {Separation Science and Technology},

  number       = 18,

  volume       = 50,

  place        = {United States},

  year         = {Sat Dec 19 00:00:00 EST 2015},

  month        = {Sat Dec 19 00:00:00 EST 2015}

}

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