7TH EUROPEAN COKE AND IRONMAKING CONGRESS - ECIC 2016

Four blast furnace steel makers and one engineering company in Japan have been prosecuted in the “CO2 Ultimate Reduction in Steelmaking Process by Innovative Technology for Cool Earth 50 (COURSE50) Project”, since FY2008 as a National Projects commissioned by New Energy and Industrial Technology Development Organization (NEDO). The target of COURSE50 is a reduction of approximately 30% in CO2 emissions in the steel manufacturing process. Two technologies are investigated, a) Reduction of iron ore by using hydrogen and hydrocarbon-containing coke oven gas to suppress CO2 emissions from blast furnaces, and b) separation and recovery of CO2 from blast furnace gas with chemical absorption method and physical adsorption method by exploitation of unused waste heat in the steel works The operation trials at LKAB's experimental blast furnace in Luleå in cooperation with LKAB and Swerea MEFOS were carried out. In the case of operation trials injected COG and reformed COG (RCOG), the increase in H2 reduction instead of C direct reduction that is a huge endothermic reaction, makes the input of C decreased comparing the reference period. Based on these results, we have developed further scheme of decreasing the C direct reduction in the blast furnace using blast control method.