Oxygen blast furnace equipment and method of manufacturing pig iron using the oxygen blast furnace equipment

摘要

To provide an oxygen blast furnace facility and a processing method of molten iron using the oxygen blast furnace facility by which a flow rate of a cooling gas can be reduced, the need for an auxiliary facility is eliminated, and temperature at the tip part of the tuyere can be efficiently cooled.SOLUTION: The oxygen blast furnace facility has an oxygen blast furnace in which pure oxygen, reducing materials, and cooling gas are blown in from a tuyere to generate blast furnace gas substantially free from nitrogen from the top of the furnace, and a by-product gas power generation facility for generating power by using the blast furnace gas generated from the top of the oxygen blast furnace and an oxygen-containing gas substantially free from nitrogen. The oxygen blast furnace facility is configured so that a part of the power generation facility exhaust gas which is substantially free from nitrogen generated from the by-product gas generation facility is used as a tuyere cooling gas for the oxygen blast furnace.SELECTED DRAWING: Figure 1