Process for the recirculated gas producing

摘要

A method for melting raw iron in a blast furnace (1) operated with oxygen or in a melting reduction system, comprising a reduction region, wherein the scrubbed raw gas (GG, EG) removed from the reduction region is recirculated by adding hydrocarbons into the reduction region. According to the invention, the scrubbed raw gas (GG, EG) is mixed with hydrocarbons and is blended with reduction gas (REDG) that has a temperature over and is obtained by the partial oxidation of hydrocarbons using oxygen gas having an oxygen content of more than 90 vol. % in order to form a recirculation gas (REZG) having a temperature over . The recirculation gas (REZG) is recirculated into the reduction region after an auto-reformation process.