Simultaneous Preheating and Fast Restart of 50 Aluminium Reduction Cells in an Idled Potline

A new soft restart technique for a potline
  • Albert Mulder
  • Anita Folkers
  • Marco A. Stam
  • Mark P. Taylor

Abstract

Due to the global economical crisis a significant amount of primary aluminium production capacity has been shutdown. A number of different strategies to restart idled aluminium reduction cells have been discussed in the literature [1, 2]. This paper describes the successful development and execution of the start-up of 50 cells simultaneously in one potline. The procedure is based on restarting reduction cells using a cold metal plate. Contrary to electrical preheating of new cells with use of cokes or graphite, these cells have been prepared with anodes positioned in direct contact and on top of the cold metal plate. The rate of preheating of the cells and associated melting of metal is controlled by a gradual line current increase. The actual start-up of the cells is performed sequentially by the addition of liquid electrolyte and moving the anode beam upwards. In this respect 50 cells have been preheated and restarted in 8 days.

Keywords

Start-up Process Control 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Vaillancourt, D. and Kazadi, J., “Metal bake restart”, Light Metals 2000 Métaux Légers, Edited by J. Kazadi and J. MasounaveGoogle Scholar
  2. [2]
    Postgraduate Certificate for Light Metals Reduction Technology 2006, University of AucklandGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society 2016

Authors and Affiliations

  • Albert Mulder
    • 1
  • Anita Folkers
    • 1
  • Marco A. Stam
    • 1
  • Mark P. Taylor
    • 2
  1. 1.Aluminium Delfzijl B.V.Delfzijlthe Netherlands
  2. 2.The Light Metals Research CentreUniversity of AucklandNew Zealand

Personalised recommendations