The breakthrough ironmaking ... Blast furnace and Syngas Hiroshi Ichikawa :Nippon Steel Sumikin Engineering Co.,Ltd. Toshitaka Nakayama :Nippon Steel Sumikin Engineering Co.,Ltd. ... •Hot metal production increases by 68% and coke rate decreases by 57% per 100kg of metallic iron per ton of pig iron. 0 10 20 20 10