DIRECT-REDUCED IRON PRODUCTION SYSTEM

摘要

This direct-reduced iron production system is provided with: a gas reformer (51) that reforms natural gas by supplying steam; a gas heater (56), which is a heating means for heating the reformed gas (52) reformed by the gas reformer (51) to a prescribed temperature and supplying said reformed gas to a reduction furnace; a direct reduction furnace (13) that uses a high-temperature reduced gas (11) containing hydrogen (H2) and carbon monoxide (CO) to directly reduce iron ore (12a) to reduced iron (12b); an acid gas removal apparatus (16) comprising an acid gas component absorption tower (16a) that removes acid gas components in a reduction furnace exhaust gas (14) discharged from the direct reduction furnace (13) using an acid gas absorbing liquid (15), and a regeneration tower (16b) that releases acid gas; and a recovered gas introduction line (L8) that supplies recovered gas (14B), which contains carbon dioxide (CO2) and hydrogen sulfide (H2S) released from the regeneration tower (16b), to the reforming furnace of the gas reformer (51) and the furnace of the gas heater (56).