Tecnologia em Metalurgia, Materiais e Mineração (Mar 2013)

IRON ORE SINTER PRODUCTION USING ELECTRIC ARC FURNACE DUST AS RAW MATERIAL

  • Victor Bridi Telles,
  • Denise Crocce Romano Espinosa,
  • Jorge Alberto Soares Tenório

DOI
https://doi.org/10.4322/tmm.2013.010
Journal volume & issue
Vol. 10, no. 1
pp. 72 – 77

Abstract

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The steel production through Electric Arc Furnaces (EAF) generates approximately 15% to 20% of Electric Arc Furnace Dust (EAFD). This waste is considered dangerous due to the presence of metals as lead and cadmium that leach in contact with water. Because of this, the EAFD recycling becomes an alternative to diminish the costs with landfills and environmental harms caused by the waste. The iron ore sintering is a process that reuses most part of powders generated by the steelmaking. However the EAFD is not reused in this process because it contains zinc. The zinc is highly detrimental inside blast furnaces causing heavy crusts and affecting the thermodynamic equilibrium of the process. Therefore, this work studies the EAFD reuse in the iron ore sintering process to produce iron ore sinter with zinc contents between the limits established for blast furnaces.

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