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Fluoride Capture Capacity of SGA: The Interplay Between Particle and Pore Size Distributions

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Light Metals 2017

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

The Bayer process, storage and transport of smelter grade alumina (SGA) together contribute to the unique particle size distribution of the SGA as received in a gas treatment facility or in a reduction cell hopper. Pore size distribution analyses of alumina fractions indicate that the +125, +90 to −125, +63 to −90 and +45 to −63 μm particles possess similar total pore volumes. The total pore volume of −45 μm particle size fraction, however, was found to be approximately 15% lower than the remaining bulk. Having earlier studied the evolution of pore size distribution in the bulk SGA during fluoride scrubbing, this work examines the interplay between particle and pore size distributions, with focus on the impact of fines on scrubbing efficiency in a smelter GTC.

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References

  1. L.M. Perander, M.A. Stam, M.M. Hyland, J.B. Metson, Towards redefining the alumina specifications sheet—the case of HF emissions, in Light Metals (2011), pp. 285–290

    Google Scholar 

  2. G.J. McIntosh, G.E.K. Agbenyegah, M.M. Hyland, J.B. Metson, Adsorptive capacity and evolution of the pore structure of alumina on reaction with gaseous hydrogen fluoride. Langmuir 31(19), 5387–5397 (2015)

    Article  Google Scholar 

  3. A. Saatci, H. Schmidt, W. Stockhausen, M. Ströder, P. Sturm, Attrition behaviour of laboratory calcined alumina from various hydrates and its influence on SG alumina quality and calcination design, in TMS Light Metals (2004), pp. 81–86

    Google Scholar 

  4. G.E.K. Agbenyegah, G.J. McIntosh, M.M. Hyland, J.B. Metson, Assessing the role of SGA porosity in the HF scrubbing mechanism, in TMS Light Metals (2016), pp. 521–525

    Google Scholar 

  5. J.F. Coyne, M.S. Wainwright, M.P. Brungs, The influence of physical and chemical properties of alumina on hydrogen fluoride adsorption, in TMS Light Metals (1987), pp. 35–39

    Google Scholar 

  6. D. Wong, N. Tjahyono, M. Hyland, The nature of particles and fines in potroom dust, in Light Metals (2014), pp. 553–558

    Google Scholar 

  7. M. Karlsen, A. Dyroy, B. Nagell, G.G. Enstad, P. Hilgraf, New aerated distribution (ADS) and anti segregation (ASS) systems for alumina. Essent. Readings Light Met. 2(6882), 590–595 (2013)

    Article  Google Scholar 

  8. H. Wijayaratne, M. Hyland, M. Taylor, A. Grama, T. Groutso, Effects of composition and granulometry on thermal conductivity of anode cover materials, in Light Metals (2011), pp. 399–404

    Google Scholar 

  9. L.M. Perander, Z.D. Zujovic, T.F. Kemp, M.E. Smith, J.B. Metson, The nature and impact of fines in smelter grade alumina. J. Met. 61(11), 33–39 (2009)

    Google Scholar 

  10. S. Chandrashekar, D. Jackson, J. Kisler, Alumina fines: journey from cradle to grave, in Alumina, International Workshop, Quality (2005), pp. 5–9

    Google Scholar 

  11. M.M. Hyland, E.C. Patterson, B.J. Welch, Alumina structural hydroxyl as a constant source of HF, in TMS Light Metals (2004), pp. 361–366

    Google Scholar 

  12. F.A. Zenz, D.F. Othmer, Fluidization and Fluid-Particle Systems (Reinhold, New York, 1960)

    Google Scholar 

  13. D. Geldart, Types of gas fluidization. Powder Technol. 7(5), 285–292 (1973)

    Article  Google Scholar 

  14. A.R. Abrahamsen, D. Geldart, Behaviour of gas-fluidized beds of fine powders part I. Homogeneous expansion. Powder Technol. 26(1), 35–46 (1980)

    Article  Google Scholar 

  15. L. Perander, Evolution of Nano- and Microstructure During the Calcination of Bayer Gibbsite to Produce Alumina (The University of Auckland, 2010)

    Google Scholar 

Download references

Acknowledgements

The authors are grateful to Hydro Aluminum AS for permitting the use of data from a related project for this publication. We also wish to thank Dr. Are Dyroy for his invaluable guidance in writing this paper.

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Authors and Affiliations

  1. Department of Chemical and Material Engineering, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand

    Gordon E. K. Agbenyegah & Margaret M. Hyland

  2. Light Metal Research Center, University of Auckland, Auckland, New Zealand

    Gordon E. K. Agbenyegah, Grant J. McIntosh, Margaret M. Hyland & James B. Metson

  3. School of Chemical Sciences, University of Auckland, Auckland, New Zealand

    Grant J. McIntosh & James B. Metson

Authors
  1. Gordon E. K. Agbenyegah
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  2. Grant J. McIntosh
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  3. Margaret M. Hyland
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  4. James B. Metson
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Corresponding author

Correspondence to Gordon E. K. Agbenyegah .

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Editors and Affiliations

  1. SINTEF , Trondheim, Norway

    Arne P. Ratvik

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© 2017 The Minerals, Metals & Materials Society

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Agbenyegah, G.E.K., McIntosh, G.J., Hyland, M.M., Metson, J.B. (2017). Fluoride Capture Capacity of SGA: The Interplay Between Particle and Pore Size Distributions. In: Ratvik, A. (eds) Light Metals 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51541-0_60

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