System and method for producing steel

Abstract

System and method for producing steel is provided that efficiently reduce carbon dioxide emissions. A steel production system includes: a first gas generating section configured to obtain a first gas by converting carbon monoxide, to carbon dioxide, in a gas containing the carbon dioxide and carbon monoxide; a reducing gas supply sectionconfigured to supply a reducing gas containing a reducing substance to reduce a reducing agent, the reducing agent containing metal oxide to reduce carbon dioxide and being oxidized by contact with the carbon dioxide; and a reaction sectionincluding a plurality of reactorsand, respectively connected to at least one of the first gas generating section and the reducing gas supply section, and the reducing agent arranged in the reactorsand, the reaction section being capable of switching between the first gas and the reducing gas to be supplied to each of the reactorsand, wherein a second gas is configured to be supplied to a blast furnace, the second gas being obtained by contacting the first gas supplied to the reactorsandwith the reducing agent to convert the carbon dioxide to carbon monoxide and the second gas having the carbon monoxide as a main component.