Título

MERITS OF PRODUCING DRI IN AN INTEGRATED STEEL WORKS USING COKE OVEN GAS

MERITS OF PRODUCING DRI IN AN INTEGRATED STEEL WORKS USING COKE OVEN GAS

Autoria

Patel, Nishit; Okrutny, Marka; Huerta, Manuel; Cameron, Ian; Pereira, Rodrigo; Gordon, Iakov

DOI

10.5151/2594-357X-23844

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Resumo

Hatch assessed the merits of producing direct reduced iron (DRI) in an integrated steel works using coke oven gas (COG) as a fuel/reductant. A gas-based direct reduction (DR) shaft furnace was added to the traditional integrated steel works flow sheet and the resulting DRI was charged to both the basic oxygen steelmaking furnace (BOF) as a scrap replacement and to the blast furnace to increase productivity and reduce coke consumption. The COG was supplemented with natural gas to increase the amount of DRI produced and scale of the DR furnace facility to make the option more cost competitive. The growing availability of low cost natural gas in North America allows integrated steel producers to consider natural gas as a competitively priced reductant. The merits of adding a dedicated DR plant are described including the impact on the integrated steel works energy balance, the cost to produce hot rolled coil, financial return on the DR plant investment, greenhouse gas and other environmental considerations.

 

Hatch assessed the merits of producing direct reduced iron (DRI) in an integrated steel works using coke oven gas (COG) as a fuel/reductant. A gas-based direct reduction (DR) shaft furnace was added to the traditional integrated steel works flow sheet and the resulting DRI was charged to both the basic oxygen steelmaking furnace (BOF) as a scrap replacement and to the blast furnace to increase productivity and reduce coke consumption. The COG was supplemented with natural gas to increase the amount of DRI produced and scale of the DR furnace facility to make the option more cost competitive. The growing availability of low cost natural gas in North America allows integrated steel producers to consider natural gas as a competitively priced reductant. The merits of adding a dedicated DR plant are described including the impact on the integrated steel works energy balance, the cost to produce hot rolled coil, financial return on the DR plant investment, greenhouse gas and other environmental considerations.

Palavras-chave

Cokemaking; Coke oven gas; Blast furnace; Direct reduction.

Cokemaking; Coke oven gas; Blast furnace; Direct reduction.