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Impacts of Mineralogy on Soluble Phosphorus Concentrations During Low Temperature Processing of Jamaican Bauxites Read chapter Read first chapter

2020 | OriginalPaper | Chapter

Aluminium Smelter Crust—Phase Distribution and Structure Analysis of Top Zone Layer

Authors : Shanghai Wei, Jingjing Liu, George Allan, Tania Groutso, John J. J. Chen, Mark P. Taylor

Published in: Light Metals 2020

Publisher: Springer International Publishing

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Abstract

Anode cover material (ACM) partly fuses at the bottom where it interacts with anode and bath in the aluminium reduction cell. This consolidated material is defined as the top crust in the cell, and plays a crucial role in maintaining heat balance, protecting the carbon anode from air-burning and absorbing the fluorides evaporation in the cells. Previous studies have been conducted to illustrate the crust formation and properties. However, there is rarely a systematic structural analysis of crust in the vertical direction due to the complexity and inhomogeneity of industrial crust. In the present study, the phase composition of crust was systematically analysed in the vertical direction, and five zones were identified based on the phase composition. Furthermore, two types of particles are identified in top zone (1) namely: smelter grade alumina (SGA) and crushed bath particles (CBPs). A systematic analysis on CBPs have shown four types of structural features.

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previous chapter Adapting Modern Industrial Operation Parameters in a Standardized Laboratory Cell for Measuring Current Efficiency for Aluminium Deposition: Unexpected Challenges and Lessons Learned
next chapter Influence of Anode Cover Material Particle Size Composition on Its Physical Property and Insulation Performance
Literature
1.
K. Grjotheim and B.J. Welch, Aluminium Smelter Technology (second edition), 1988, Aluminium-Verlag.
2.
H. Kvande and P.A. Drablos, The Aluminum smelting process and innovative alternative technologies, JOEM, 56(2014) s23–s32.
3.
X. Shen, Top cover and energy balance in Hall-Heroult cell, PhD thesis, University of Auckland, 2004.
4.
Q. Zhang, Thermochemical Behaviour and Stability of Aluminium Smelter Crust, Auckland: University of Auckland, 2015.
5.
J.N. Bruggeman, Pot heat balance fundamentals. 6th Australasian Aluminium Smelting Technology Conference and Workshop, 1998: pp. 167–190.
6.
W. Haupin, Interpreting the components of cell voltage. Light Metals, 1998: pp. 531–537.
7.
W. Haupin, and H. Kvande, Thermodynamics of electrochemical reduction of alumina. Light Metals, 2000: pp. 379–384.
8.
M.P. Taylor, Challenges in optimising and controlling the electrolyte in aluminium smelters. In Molten Slags, Fluxes and Salts’97 Conference. 1997.
9.
M.P. Taylor, Anode cover materials—Science, practice and future needs, Proceedings of 9th Australasian Aluminium smelting technology conference, 2007.
10.
S. Wilkening, P. Reny, and B. Murphy, Anode cover material and bath level control. Light Metals, 2005: pp. 367–372.
11.
L.N. Less, The crusting behaviour of smelter alumina, Met. Trans., 8B, 1977, pp. 219–225.
12.
A.R. Johnson, Alumina Crusting and Dissolution in Molten Electrolyte, Journal of Metals, 1982, pp. 63–68.
13.
T.J. Johnston and N.E. Richards, Correlation between alumina properties and crusts. Journal of Metals, 1983: pp. 48–52.
14.
D.W. Townsend and L.G. Boxall, Crusting behaviour of smelter aluminas. Light Metals, 1984: pp. 613–621.
15.
R. Oedegard, S. Roenning, S. Rolseth and J. Thonstad, Crust formation in Aluminium cells, Journal of Metals, (1985) 25–28.
16.
R. Oedegard, S. Roenning, S. Rolseth and J. Thonstad, On alumina phase transformation and crust formation in aluminium cells. Light Metals, (1985) 695–709.
17.
G. Hatem, M. Llavona, T. Log, J.P. Sancho and T. Ostvold: Thermal conductivity of some of alumina powders and synthetic Hall-Heroult crust, Light Metals, AIME, 1989, pp. 365–370.
18.
M.A. Llavona, L.F. Verdeja, R. Zapico, F. Alvarez, J.P. Sancho, Density, hardness and thermal conductivity of hall-heroult crusts, Light Metals, (1990) 429–437.
19.
T. Eggen, S. Rolseth, K.A. Rye, and J. Thonstad, Alumina crusting in cryolitic melts. Part I: Penetration of molten electrolyte into alumina. Light Metals, 1992: pp. 495–502.
20.
K.A. Rye, Alumina crusting in cryolitic melts. Part II: Bulk properties of crust. Light Metals, 1992: pp. 503–509.
21.
K.A. Rye, J. Thonstad and X. Liu, Heat transfer, thermal conductivity, and emissivity of Hall-Heroult top crust, Light Metals, (1995) 441–449.
22.
X. Liu, M. Taylor, and S. George, Crust formation and deterioration in industrial cells. Light Metals, 1992: pp. 489–494.
23.
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.
24.
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. pp. 675–680.
25.
Q. Zhang, M.P. Taylor, and J.J. Chen, The Melting Behaviour of Aluminium Smelter Crust, Light Metals 2014. pp. 591–596.
26.
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): pp. 1520–1534.
27.
T. Groutso, M. Taylor, and A.K. Hudson, Aspects of Crust Formation from Today’s Anode Cover Material. Light Metals, 2009: pp. 405–410.
28.
H. Gudmundsson, Improving Anode Cover Material Quality at Nordural—Quality Tools and Measures, Light Metals, (2009) 467–472.
29.
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, pp. 399–404.
30.
M. LeBreux, M. Désilets, A. Blais, and M. Lacroix, On the Prediction of the Crust Inside Aluminum Electrolysis Cells, Light Metals, (2014) 655–660.
31.
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.
32.
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.
33.
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.
34.
V. Khokhlov, et al., Thermal conductivity in cryolitic metls-new data and its influence on heat transfer in aluminium cells, Light Metals, 1998: pp. 501–506.
35.
ASM Metal Handbook: volume 10, Materials Characterisation, 1986, Page 34.
36.
PANalytical, B., Pert HighScore Plus software, version 3.0 e. Almelo: Netherlands, 2012.
37.
H. Wijayaratne, G. Mcintosh, M. Hyland, L. Perander, and J. Metson, Relationships between smelter grade alumina characteristics and strength determined by nanoindentation and ultrasound-mediated particle breakage, 48A(2017) 3046–3059.
38.
L.M. Perander, Z.D. Zujovic, T.F. Kemp, M.E. Smith and J.B. Metson, The nature and impacts of fines in smelter-grade alumina, 61(2009) 33–39.
Metadata
Title
Aluminium Smelter Crust—Phase Distribution and Structure Analysis of Top Zone Layer
Authors
Shanghai Wei
Jingjing Liu
George Allan
Tania Groutso
John J. J. Chen
Mark P. Taylor
Copyright Year
2020
Book
Light Metals 2020

Print ISBN: 978-3-030-36407-6

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

Copyright Year: 2020

DOI
https://doi.org/10.1007/978-3-030-36408-3_87

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