The two-high blast furnace: A twenty-first-century system

In the twenty-first century, reduction in coke consumption during blast-furnace smelting to the theoretical minimum (160 kg/t of hot metal) is the key factor in improving the technology. One possibility is to include a cyclone reactor when using a 1: 1 mixture of coal-dust fuel and ore fines (concentrate) with an intense blast (1200°C, 30–40% O₂).