Influence of temperature and contact pressure between cast iron and cathode carbon on contact resistance

Book · Tue Oct 01 00:00:00 EDT 1996

OSTI ID:371965

Hiltmann, F; Mittag, J ^[1]; Stoere, A; Oeye, H A ^[2]

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1. SGL Carbon AG, Frankfurt (Germany)
2. Norwegian Inst. of Tech., Trondheim (Norway). Inst. of Inorganic Chemistry

The contact resistance between the cathode block and cast iron, as collector bar casting agent, is said to give a significant contribution to the cathode voltage drop (CVD) measured in aluminum electrolysis cells. Five typical cathode carbon qualities were examined in this respect from room temperature to 950 C. At cell operating temperature the contact resistance in new cells is found to be usually negligible in comparison to other resistance effects. However, inadequate casting parameters and cell aging processes leading to an improper contact or contact pressure may impede the current flow between cast iron and cathode block considerably and hence result in an increasing CVD with cell age.

• OSTI ID: 371965
• Report Number(s): CONF-960202-; ISBN 0-87339-312-0; TRN: IM9641%%42
• Resource Relation: Conference: Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Anaheim, CA (United States), 4-8 Feb 1996; Other Information: PBD: 1996; Related Information: Is Part Of Light metals 1996; Hale, W. [ed.] [Anglesey Aluminum Metal Ltd., North Wales (United Kingdom)]; PB: 1304 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
ELECTROLYSIS
ELECTROCHEMICAL CELLS
INTERFACES
ELECTRIC CONTACTS
ELECTRIC CONDUCTIVITY
TEMPERATURE DEPENDENCE
PRESSURE DEPENDENCE
PHYSICAL PROPERTIES
MECHANICAL PROPERTIES
THERMAL EXPANSION
EXPERIMENTAL DATA