MIDREX H2: Ultimate Low CO2 Ironmaking and its place in the .
WEBThe BF uses coke (refined coal) as the energy source and reductant. This process route generates about two tons of CO2 for every ton of steel produced. The natural gasbased MIDREX® Direct Reduction (DR) Process, paired with an electric arc furnace (EAF), has the lowest CO2 emissions of any commercially proven steelmaking route.