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INVESTIGATION OF THE INCREASE IN RESISTIVITY IN THE STEEL COLLECTOR BAR USED IN ALUMINUM ELECTROLYSIS CELLS

G. Gauvin, D. Larouche

2011enaluminumelectrolysisresistivityconductorssteelaluminum electrolysiscollector barselectrical resistivitycarbon migrationcathode cells

Abstract

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Life span of aluminum smelting electrolysis cells can reach up to 3000 days. During this period, cathode blocks undergo various physical and chemical changes that could result in an increase of electrical resistivity. This paper focuses on the collector steel bar electrical resistivity evolution. To reveal the main phenomena responsible for the electrical resistivity increase, chemical analysis, metallographic and electrical resistivity tests were conducted on two steel bars picked from two Hall-Héroult cells after autopsies. Cathode voltage drop and temperature were measured using electrically insulated internal probes and thermocouples on 16 samples from each steel bar. Electrical resistivity can reach up to 1.21μΩ-m for a steel bar aged 2505 days compared to 0.142μΩ-m for steel AISI 1008 at room temperature.

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Cite This Work

@article{5252dd36-51cb-4e6f-8ba8-a396b574928b,
  title={INVESTIGATION OF THE INCREASE IN RESISTIVITY IN THE STEEL COLLECTOR BAR USED IN ALUMINUM ELECTROLYSIS CELLS},
  author={G. Gauvin and D. Larouche},
  year={2011},
  language={en}
}
TY  - JOUR
TI  - INVESTIGATION OF THE INCREASE IN RESISTIVITY IN THE STEEL COLLECTOR BAR USED IN ALUMINUM ELECTROLYSIS CELLS
AU  - G. Gauvin
AU  - D. Larouche
PY  - 2011
LA  - en
ER  -

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