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Potline Startup with Low Anode Effect Frequency

  • Willy Kristensen
  • Gauti Höskuldsson
  • Barry Welch

Abstract

Nordural has had a policy of continuous improvements, including reducing the total carbon dioxide greenhouse gas equivalents by lowering anode effect frequency, gross and net carbon to the level where the smelters total attributable emissions (including allowance for anode baking) is less than 1800 kg CO2 equivalents / tonne of Al, The technology and work practice changes to achieve the improvements have been described elsewhere3.

For the start up of the second potline, further modifications were carried out to the cell pre-heat and start-up work practice to ensure a rapid, but manageable, potline commissioning using the existing work force. Four cells were started up in quick succession each day. Despite the normal problems associated with the commissioning new plant and equipment, during the start up of the first 100 cells the anode effect frequency, as counted from the time of bath-up of each cell was less than 0.09 anode effects per pot day with the average duration being similar to that of the established potline.

The Paper describes the design improvements, work practices and operating strategy used to achieve this smooth commissioning with a low demand on the work force.

Keywords

Potline startup Anode effect reduction 

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References

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Copyright information

© The Minerals, Metals & Materials Society 2016

Authors and Affiliations

  • Willy Kristensen
    • 1
  • Gauti Höskuldsson
    • 1
  • Barry Welch
    • 2
    • 3
  1. 1.Nordural - Century Aluminium Ltd301 AkranesIceland
  2. 2.Welbank Consulting LtdAucklandNew Zealand
  3. 3.Centre for Electrochemistry & Mineral Processing Univ. of N.S.W. SydneyAustralia

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