Cristin-resultat-ID: 1850445
Sist endret: 22. mars 2021, 17:49
Vitenskapelig foredrag

High silicon iron alloy from bauxite residue

  • Halvor Dalaker og
  • Casper van der Eijk


Navn på arrangementet: 3rd International Bauxite Residue Valorisation and Best Practices Conference| Virtual Conference
Dato fra: 29. september 2020
Dato til: 1. oktober 2020

Om resultatet

Vitenskapelig foredrag
Publiseringsår: 2020

Beskrivelse Beskrivelse


High silicon iron alloy from bauxite residue


Bauxite residue (BR) contains typically 20 to 50% iron oxide. A full valorisation of the BR requires that this iron is returned to the market. It is not difficult to recover this iron as pig iron, but the market price for pig iron is too low to make this economically viable. Iron alloys with high silicon content have higher value than pig iron, and BR contains between 5 and 15% silicon oxide. Therefore, it is attempted to produce iron alloys from BR with the maximum possible Si content, extracting as much silicon as possible from the BR and increasing the value of the metal. Bauxite residue sourced from 3 different alumina refineries and one legacy site have been tested in both fluxed and unfluxed experiments, supported by thermodynamic modelling. A maximum silicon-level of 17 wt% in the metal alloy has been achieved in experiments with BR fluxed with quartz.


Halvor Dalaker

  • Tilknyttet:
    ved Bærekraftig energiteknologi ved SINTEF AS

Casper van der Eijk

  • Tilknyttet:
    ved Metallproduksjon og prosessering ved SINTEF AS
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