METHOD AND APPARATUS FOR OPERATING A MELT REDUCTION PROCESS

摘要

A method and a device are provided for operating a smelting reduction process, wherein at least part of an export gas from a blast furnace (1) or a reduction unit (R1) is thermally utilized in a gas turbine and the exhaust gas of this gas turbine (24) is used in a waste heat steam generator (16) to generate steam.  The remaining part of the export gas is fed to a CO2 separation apparatus (8), the tail gas thereby obtained being fed to a waste heat steam generator (16) and burned for additional steam generation.  According to the invention, the combustible components of the tail gas are sent for thermal utilization in a steam generator, so that the overall energy balance of the thermal use of the export gas is improved.  In addition, a further part of the export gas is qualitatively improved by the CO2 separation apparatus (8), so as to generate a high-quality reduction gas which can be supplied for metallurgical use.