Direct reduced iron production apparatus and direct reduced iron production method

摘要

The directly reduced iron manufacturing apparatus 100 reduces the carbon dioxide contained in the reaction gas and the shift reactor 25 that obtains the reaction gas having a higher hydrogen concentration than the exhaust gas from the exhaust gas of the direct reduction furnace 30 by the water gas shift reaction. In a de-CO2 facility 28 for obtaining a circulating gas containing hydrogen, a heater 29 for heating the circulating gas directly supplied to the reduction furnace 30, and a gas flow path 21 between the heater 29 and the direct reduction furnace 30, The connecting part 51 for joining the circulating gas and the coal gas, and the decompression part 19 are provided in the gas flow path of the coal gas between the coal gasification furnace 10 and the connecting part 51.