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Light Metals 2013 pp 1097-1100 | Cite as

Measures to Prevent Baked Anode Density Drop When Using High Porosity Cokes

  • Vinicius Piffer
  • Chin Woo
  • Fabiana Nicéas
  • Rafael Bacelar
  • Jeronimo Araujo
  • Leonardo Paulino
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

In the last years, coke quality has been deteriorating throughout the world. One of the most affected properties is the coke porosity, commonly measured by the Vibrated Bulk Density (VBD). It is well known that the drop in VBD has a direct impact in the Baked Anode properties, especially Baked Apparent Density (BAD). This paper describes some measures taken at Alumar Smelter that enabled the BAD to be kept constant when using low VBD cokes.

A complete analysis of the system was carried out and several aspects were considered as potential for improving density. The most significant being the changes made in the fines fraction and optimization of mixing and forming. Whenever applicable, anode properties were compared before and after the changes, in order to estimate each action impact.

Keywords

Carbon Anode Coke Density VBD BAD 

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References

  1. 1.
    C. Kato, H. Truci, F. Figueiredo, A. Nascimento and V. Piffer, “ALUMAR Coke Blending Facility Strategy”, Light Metals 2007, pp 891–894.Google Scholar
  2. 2.
    L. Edwards, M. Lubin and J. Marino, “Improving the Repeatability of Coke Bulk Density Testing”, Light Metals 2011, pp 947–952.Google Scholar
  3. 3.
    F. Laplante and L. Duchesneau, “ASTM D7454 Vibrated Bulk Density Method – Principles and Limitations”, Light Metals 2011, pp 953–957.Google Scholar
  4. 4.
    W.K. Fischer and R.C. Perruchoud, “Test Methods for the Determination of Prebaked anode Properties”, Anodes for the Aluminum Industry, Sierre, Switzerland, R&D Carbon Ltd., 1995, pp 281–291.Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 2016

Authors and Affiliations

  • Vinicius Piffer
    • 1
  • Chin Woo
    • 2
  • Fabiana Nicéas
    • 1
  • Rafael Bacelar
    • 1
  • Jeronimo Araujo
    • 1
  • Leonardo Paulino
    • 1
  1. 1.Consorcio de Aluminio do Maranhao (Alumar)São LuisBrazil
  2. 2.Alcoa IncKnoxvilleUSA

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