Electrical Resistivity Measurement of Petroleum Coke Powder by Means of Four-Probe Method
Abstract Carbon anodes used in Hall–Héroult electrolysis cells are involved in both electrical and chemical processes of the cell. Electrical resistivity of anodes depends on electrical properties of its constituents, of which carbon coke aggregates are the most prevalent. Electrical resistivity of coke aggregates is usually characterized according to the ISO 10143 standardized test method, which consists of measuring the voltage drop in the bed of particles between two electrically conducing plungers through which the current is also applied. Estimation of the electrical resistivity of coke particles from the resistivity of particle bed is a challenging task and needs consideration of the contribution of the interparticle void fraction and the particle/particle contact resistances. In this work, the bed resistivity was normalized by subtracting the interparticle void fraction. Then, the contact size was obtained from discrete element method simulation and the contact resistance was calculated using Holm’s theory. Finally, the resistivity of the coke particles was obtained from the bed resistivity..
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2017 |
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| Erschienen: |
2017 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:48 |
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| Enthalten in: |
Metallurgical and materials transactions / B - 48(2017), 5 vom: 06. Juli, Seite 2543-2550 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Rouget, G. [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| Anmerkungen: |
© The Minerals, Metals & Materials Society and ASM International 2017 |
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| doi: |
10.1007/s11663-017-1022-9 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
OLC2059786886 |
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| 520 | |a Abstract Carbon anodes used in Hall–Héroult electrolysis cells are involved in both electrical and chemical processes of the cell. Electrical resistivity of anodes depends on electrical properties of its constituents, of which carbon coke aggregates are the most prevalent. Electrical resistivity of coke aggregates is usually characterized according to the ISO 10143 standardized test method, which consists of measuring the voltage drop in the bed of particles between two electrically conducing plungers through which the current is also applied. Estimation of the electrical resistivity of coke particles from the resistivity of particle bed is a challenging task and needs consideration of the contribution of the interparticle void fraction and the particle/particle contact resistances. In this work, the bed resistivity was normalized by subtracting the interparticle void fraction. Then, the contact size was obtained from discrete element method simulation and the contact resistance was calculated using Holm’s theory. Finally, the resistivity of the coke particles was obtained from the bed resistivity. | ||
| 700 | 1 | |a Majidi, B. |4 aut | |
| 700 | 1 | |a Picard, D. |4 aut | |
| 700 | 1 | |a Gauvin, G. |4 aut | |
| 700 | 1 | |a Ziegler, D. |4 aut | |
| 700 | 1 | |a Mashreghi, J. |4 aut | |
| 700 | 1 | |a Alamdari, H. |4 aut | |
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