3 An apparatus for preventing the sticking in the 3-step fluidized bed type apparatus for reducing the fine iron ore and method therefor

摘要

The present invention relates to a fluidized bed reduction apparatus and a reduction method using the same, which can prevent the adhesion of the powdered reducing iron generated in the flow reduction step using the dust in the melt gasification.;The present invention relates to a first fluidized bed for primary reduction of ferrous ore having a wide particle size distribution, a second fluidized bed for secondary reduction of primary reduced iron ore discharged from the first fluidized bed, and discharged from the second fluidized bed. A third fluidized bed for tertiary reduction of secondary reduced iron ore, wherein molten iron is prepared by melting first and second cyclones, and finally reduced iron ores, which collect and recycle particulate ore in exhaust gas to the fluidized bed. A fluidized bed reduction apparatus comprising a melt gasifier, comprising: a fourth cyclone for firstly collecting dust in a large amount of carbon-containing exhaust gas discharged from the melt gasifier; A fifth cyclone for secondarily collecting the ultrafine dust in the reducing gas supplied from the fourth cyclone; A three-stage fluidized-bed reduction device comprising: first, second, and third dust storage bins and first and second nitrogen injectors for blowing the ultrafine dust of the fifth cyclone into the third fluidized bed furnace, and using the same The point concerning a reduction method is made into the summary.