Spatial Methods for Characterising Carbon Anodes for Aluminium Production View Full Text


Ontology type: schema:Chapter      Open Access: True


Chapter Info

DATE

2015

AUTHORS

Camilla Sommerseth , Rebecca Jayne Thorne , Stein Rørvik , Espen Sandnes , Arne Petter Ratvik , Lorentz Petter Lossius , Hogne Linga , Ann Mari Svensson

ABSTRACT

Pilot test anodes were designed by Hydro Aluminium for laboratory studies using controlled blends of <2 mm aggregate from two single source cokes. Spatial and imaging methods were used to characterise anode surfaces with respect to consumption, density, pore distribution and real active area before and after electrolysis. The methods include X-ray computed tomography (CT), confocal microscopy, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). It was found that during electrolysis, the electrolyte does not completely wet the carbon inside large pores on the surface. Hence, even large pores do not contribute to the electrochemically active surface area. Large grains of isotropic cokes and anisotropic sponge cokes are consumed at approximately the same rate, and bubble coke in anisotropic sponge cokes are consumed at a slower rate than the bulk material. This is due to higher resistivity through the bubble coke. More... »

PAGES

1141-1146

References to SciGraph publications

Book

TITLE

Light Metals 2015

ISBN

978-3-319-48610-9
978-3-319-48248-4

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-319-48248-4_191

DOI

http://dx.doi.org/10.1007/978-3-319-48248-4_191

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1015587430


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