Título

MYTHS AND REALITIES OF CHARGING DRI/HBI IN ELECTRIC ARC FURNACES

Autoria

Hornby, Sara; Madias, Jorge; Torre, Francisco

Hornby, Sara

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Madias, Jorge

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Torre, Francisco

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DOI

10.5151/1982-9345-26308

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Resumo

After almost half a century of experience in using DRI/HBI in electric arc furnaces (EAFs), and taking into account the decrease of natural gas cost in the USA, it is interesting to revisit some trends and controversial issues around this alternative iron source. This paper reviews aspects like the evolution of iron ore quality and its influence on EAF operation; DRI stockpiling and transport, regarding the risk for selfcombustion; optimum charge design; cold DRI/HBI charging (fifth hole, bucket, transporter); hot charging (ways and results); carbon content, metallization and silica in DRI/HBI, and its influence on EAF operation and performance; oxygen / carbon balance; chemical energy and DRI/HBI charge.

Palavras-chave

DRI, HBI, EAF, Energy consumption

Energy consumption