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2019 | OriginalPaper | Buchkapitel

Microstructure and Properties Analysis of Aluminium Smelter Crust

verfasst von : Shanghai Wei, Jingjing Liu, Chathuni Ranaweera, Tania Groutso, Mark Taylor

Erschienen in: Light Metals 2019

Verlag: Springer International Publishing

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Abstract

As a protective top layer of an aluminium reduction cell, crust is a consolidation of anode cover materials which are made of a mix of crushed bath and alumina. Crust through its strength and barrier properties (air, HF) plays a vital role in maintaining overall heat balance, protecting anode and controlling fluoride loss. Numerous studies have investigated the crust formation. However, there is currently a significant knowledge gap regarding the microstructure and mechanical properties of crust. The mechanical properties of crust are important for the recycling of the material as crushed bath which will then become new cell crust. This research has conducted the microstructure and compressive deformation analysis on a range of crust samples for the first time. The crust samples from industrial cells have been divided into two categories: drop and shattered (DS) and uncrushable (U) crust samples. Both DS and U crust samples have shown brittle fracture, but the compressive deformation of U samples shows unique plateau deformation and hardening stages, which is due to well-developed corundum and its well-spread interlocking network with bath structure.

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Vorheriges Kapitel Transfer Processes in the Bath of High Amperage Aluminium Reduction Cell

Nächstes Kapitel Sideledge in Aluminium Cells: Further Considerations Concerning the Trench at the Metal-Bath Boundary

X. Shen, Top cover and energy balance in Hall-Heroult cell, PhD thesis, University of Auckland, 2004.

M.P. Taylor, Anode cover materials – Science, practice and future needs, Proceedings of 9th Australasian Aluminium smelting technology conference, 2007.

Q. Zhang, Thermochemical Behaviour and Stability of Aluminium Smelter Crust, Auckland: University of Auckland, 2015.

S. Wilkening, P. Reny, and B. Murphy, Anode cover material and bath level control. Light Metals, 2005: p. 367–372.

M.P. Taylor, G. L. Johnson, E. W. Andrews and B. J. Welch, Impact of anode cover control and anode assembly design on reduction cell performance, Light Metals, (2004) 199–206.

T. Groutso, M. Taylor, and A.K. Hudson, Aspects of Crust Formation from Today’s Anode Cover Material. Light Metals, 2009: p. 405–410.

H. Gudmundsson, Improving Anode Cover Material Quality at Nordural—Quality Tools and Measures, Light Metals, (2009) 467–472.

Q. Zhang, M.P. Taylor, J.J. Chen, D. Cotton, T. Groutzo, X. Yang, Composition and Thermal Analysis of Crust Formed from Industrial Anode Cover, Light Metals 2013. p. 675–680.

Q. Zhang, M.P. Taylor, and J.J. Chen, The Melting Behaviour of Aluminium Smelter Crust, Light Metals 2014. p. 591–596.

10.

Q. Zhang, M.P. Taylor, and J.J. Chen, Computational Modeling of Thermochemical Evolution of Aluminum Smelter Crust. Metallurgical and Materials Transactions B, 2015. 46(3): p. 1520–1534.

11.

H. Wijayaratne, M. Hyland, M. Taylor, A. Grama, and T. Groutso, Effects of Composition and Granulometry on Thermal Conductivity of Anode Cover Materials, Light Metals, 2011, 399–404.

12.

K.A. Rye, J. Thonstad and X. Liu, Heat transfer, thermal conductivity, and emissivity of Hall-Heroult top crust, Light Metals, (1995) 441–449.

13.

M. LeBreux, M. Désilets, A. Blais, and M. Lacroix, On the Prediction of the Crust Inside Aluminum Electrolysis Cells, Light Metals, (2014) 655–660.

14.

F. Allard, M. Desilets, M. Lebreux, A. Blais, Chemical characterisation and thermodynamic investigation of anode crust used in aluminium electrolysis cells, Light Metals, (2015) 565–570.

15.

M. LeBreux, M. Desilets, F. Allard and A. Blais, Modeling and measurements of anode cover behaviour inside aluminium electrolysis cells, Numerical Heat Transfer, Part A: Application, 69(2016) 2, 128–145.

16.

J.J. Liu, S. Wei, M.P. Taylor, Understanding the structure of ledge and crust in modern cells, 12th Australasian Aluminium smelting technology conference, 2018, submitted.

17.

S. Wei, J.J. Liu, G. Allan, T. Groutso, M.P. Taylor, Microstructure of Aluminium smelter Crust, in preparation.

18.

G.S. Collins, H.J. Melosh, B.A. Ivanov, Modeling damage and deformation in impact simulations, Meteoritics & Planetary Science, 39(2004) 2, 217–231.

19.

I. Vegt & K. van Breugel, Fracture mechanics of concrete under impact loading. In Fracture mechanics of concrete and concrete structures.; A Carpinteri; P Gambarova; G Ferro; G Plizzari., Ed.; London, Taylor & Francis, 2007. p. 579–587.

20.

C.G. Sammis and M.F. Ashby, The failure of brittle porous solids under compressive stress states, Acta. Metall, 34(1986)3, 511–526.

Titel: Microstructure and Properties Analysis of Aluminium Smelter Crust
verfasst von: Shanghai Wei
Jingjing Liu
Chathuni Ranaweera
Tania Groutso
Mark Taylor
Verlag: Springer International Publishing
Buch: Light Metals 2019
Print ISBN: 978-3-030-05863-0

Electronic ISBN: 978-3-030-05864-7

Copyright-Jahr: 2019
DOI: https://doi.org/10.1007/978-3-030-05864-7_95

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