Fluidized-bed preliminary reduction device of iron ores, a melt reduction device and a preliminary reduction method

摘要

The present invention relates to a fluidized-bed reduction apparatus for powdered iron ores that preliminarily reduces iron ores having a wide particle size distribution in a molten reduction method for producing pig iron by directly using iron ore and general coal, and a method for preliminary reduction of iron ores using the same and preliminarily reduced reduced iron The present invention relates to a melting and reducing apparatus for producing molten iron by melt-reduction.;The present invention relates to a three-stage fluidized-bed preliminary reduction apparatus for powdered iron ores,;Wherein at least one of the first and second fluidized-bed reactors is configured to reduce the atmospheric ore ore in the first fluidized-bed reduction reactor and the medium / fine ore at the second fluidized-bed reduction reactor, A final fluidized-bed reduction furnace configured to receive the final ore ore from the final fluidized-bed reduction reactor and to discharge the middle ore ore while discharging it to form a bubble fluidized bed, and to discharge the final ore ore to the final fluidized-bed reduction reactor The present invention is also directed to a fluidized-bed preliminary reducing apparatus for powdered iron ores further comprising a third high-temperature cyclone, a method for preliminary reduction of powdered iron ores by using this apparatus, and a melting-It is essential.