METHOD FOR MELTING RAW IRON WHILE RECIRCULATING BLAST FURNACE GAS BY ADDING HYDROCARBONS

摘要

The present invention relates to an oxygen-operated blast furnace (1) in which there is a reduction zone and in which the purified source gas (GG, EG) discharged from the reduction zone is recycled to the reduction zone by addition of hydrocarbons, To a method for melting pig iron. According to the present invention, the purified source gases (GG, EG) are mixed with hydrocarbons and have a temperature in excess of 1000 캜 and greater than 90% by volume in order to form a recycle gas (REZG) (REDG) produced by the partial oxidation of hydrocarbons by an oxygen gas having an oxygen content of about 20%, and the recycle gas (REZG) is recycled into the reduction zone according to the auto-reforming process.