Application of thermochemical hydrogen production iodine-sulfur process to shaft furnace direct reduction ironmaking process

Kasahara, Seiji  ; Kubo, Shinji  ; Noguchi, Hiroki  ; Ohashi, Hirofumi ; Ogawa, Masuro

Iodine-sulfur process (IS process) is a hydrogen production process from water by using heat around 900 C without CO production. An ironmaking plant combining IS process and hydrogen direct reduction shaft furnace is proposed. Heat/mass balance analysis of the plant was carried out by flowsheet calculation. Comparison of the process with a conventional blast furnace plant and a direct reduction process using reformed natural gas was carried out. Though total heat input to the process was greatest in these plants, CO production of the hydrogen plant was 8 % of the blast furnace plant.