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Alumninum

In-Pot Testing of Hatch Anode Nails

Reduced power consumption saves electricity costs

Aluminerie Alouette Inc. | Canada | 2015

Demonstrated

power savings potential

Demonstrated

improvement in current stability

Challenges

  • Regular anode assemblies with a cast-iron connection between rod stub and carbon anode (STC connection) suffer from high electrical resistance due to solidification shrinkage of the iron.

Solutions

  • Hatch anode nails form a tight, conductive bridge across the shrinkage gap. This reduces the electrical resistance of the anode assembly, making it less dependent on temperature.

Highlights

  • Reduced power consumption (kwh/kg Al)
  • Increased current efficiency(%) due to lower pot noise (unstable current)
  • Anticipated longer stub life due to colder stubs from less ohmic heating

Services & technologies provided

Aluminum

Aluminum Reduction

Technology development


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