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2020 | OriginalPaper | Buchkapitel

Inhibition of Kaolinite Dissolution in Bayer Liquor Through Lithium Addition

verfasst von : Horace Ogilvie, James Vaughan, Hong Peng

Erschienen in: Light Metals 2020

Verlag: Springer International Publishing

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Abstract

With increasing reactive silica in bauxite, sodium hydroxide consumption increases due to the increased precipitation of desilication products in the Bayer process. In this study, we report on how the presence of lithium in Bayer liquor inhibits the dissolution of kaolinite. The inhibition was studied at a temperature of 90 °C with residence times up to 6 h, and with Li:Si molar ratios of 0, 0.1, 0.5 and 1. The inhibition effect is attributed to the localised precipitation of Li/Al LDH (LiAl₂(OH)₇·2H₂O) or adsorption of Li⁺ on the kaolinite surface. This phenomenon enables a low temperature digestion process to be contemplated whereby gibbsite is selectively dissolved in the presence of kaolinite, potentially leading to significant savings in sodium hydroxide as well as a low-alkaline bauxite residue. Economic trade-offs between lithium addition rates and sodium hydroxide savings are discussed.

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Vorheriges Kapitel Low-Quality Aluminum-Containing Raw Materials: Experience, Problems and Prospects

Nächstes Kapitel Ionic Effect of NaCl and KCl on the Flotation of Diaspore and Kaolinite Using Sodium Oleate as Collector

Smith, P., The processing of high silica bauxites—review of existing and potential processes. Hydrometallurgy, 2009. 98(1): p. 162–176.

Laws, M.P., Reactions of Kaolinite in the Predesilication Processing of Bauxite Ores. 2005: University of Melbourne, School of Chemistry.

Peng, H., D. Seneviratne, and J. Vaughan, Role of the amorphous phase during sodium aluminosilicate precipitation. Industrial & Engineering Chemistry Research, 2018. 57(5): p. 1408–1416.

Peng, H., M. Ding, and J. Vaughan, The Anion Effect on Zeolite Linde Type A to Sodalite Phase Transformation. Industrial & Engineering Chemistry Research, 2018. 57(31): p. 10292–10302.

Peng, H., S. Peters, and J. Vaughan, Leaching Kinetics of Thermally-Activated, High Silica Bauxite, in Light Metals 2019. 2019, Springer. p. 11–17.

Ma, J., Z. Li, and Q. Xiao, A new process for Al2O3 production from low-grade diasporic bauxite based on reactive silica dissolution and stabilization in NaOH‐NaAl (OH) 4 media. AIChE Journal, 2012. 58(7): p. 2180–2191.

Hollitt, M., J. Kisler, and B. Raahauge. The Comalco bauxite activation process. in Proceedings of 6th International Alumina Quality Workshop. 2002.

Vaughan, J., H. Peng, D. Seneviratne, H. Hodge, W. Hawker, P. Hayes, and W. Staker, The Sandy Desilication Product Process Concept. JOM, 2019: p. 1–8.

Harato, T. The development of a new Bayer process that reduces the desilication loss of soda by 50% compared to the conventional process. in Fourth International Alumina Quality Workshop, Darwin, NT. 1996.

10.

Harato, T., T. Ishida, Y. Kumagae, M. Inami, K. Ishibashi, and M. Murakami, Process for production of aluminum hydroxide from ore containing alumina. 1996, Google Patents.

11.

Swain, B., Recovery and recycling of lithium: A review. Separation and Purification Technology, 2017. 172: p. 388–403.

12.

Mohr, S.H., G.M. Mudd, and D. Giurco, Lithium resources and production: critical assessment and global projections. Minerals, 2012. 2(1): p. 65–84.

13.

Heidari, N. and P. Momeni, Selective adsorption of lithium ions from Urmia Lake onto aluminum hydroxide. Environmental Earth Sciences, 2017. 76(16): p. 551.

14.

Huang, W.-q., G.-h. Liu, P. Liu, T.-g. Qi, X.-b. Li, Z.-h. Peng, and Q.-s. Zhou, Equilibrium concentration of lithium ion in sodium aluminate solution. Journal of Central South University, 2019. 26(2): p. 304–311.

15.

Van Straten, H., M. Schoonen, and P. De Bruyn, Precipitation from supersaturated aluminate solutions. III. Influence of alkali ions with special reference to Li+ . Journal of Colloid and Interface Science, 1985. 103(2): p. 493–507.

16.

Wang, S.-L., C.-H. Lin, Y.-Y. Yan, and M.K. Wang, Synthesis of Li/Al LDH using aluminum and LiOH. Applied Clay Science, 2013. 72: p. 191–195.

17.

Peng, H., J. Vaughan, and J. Vogrin, The effect of thermal activation of kaolinite on its dissolution and re- precipitation as zeolites in alkaline aluminate solution. Applied Clay Science, 2018. 157: p. 189–197

18.

Peng, H. and J. Vaughan. In-Situ XRD Investigation of Bauxite Dehydroxylation. in TMS Annual Meeting & Exhibition. 2018. Springer.

19.

Qu, J., X. He, B. Wang, L. Zhong, L. Wan, X. Li, S. Song, and Q. Zhang, Synthesis of Li–Al layered double hydroxides via a mechanochemical route. Applied Clay Science, 2016. 120: p. 24–27.

20.

Heller-Kallai, L. and I. Lapides, Reactions of kaolinites and metakaolinites with NaOH—comparison of different samples (Part 1). Applied Clay Science, 2007. 35(1): p. 99–107.

Titel: Inhibition of Kaolinite Dissolution in Bayer Liquor Through Lithium Addition
verfasst von: Horace Ogilvie
James Vaughan
Hong Peng
Verlag: Springer International Publishing
Buch: Light Metals 2020
Print ISBN: 978-3-030-36407-6

Electronic ISBN: 978-3-030-36408-3

Copyright-Jahr: 2020
DOI: https://doi.org/10.1007/978-3-030-36408-3_5

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