Circulating fluidized-bed preliminary reduction furnace of iron ore

摘要

The present invention relates to a circulating fluidized-bed preliminary reducing furnace for preliminary reduction of iron ore having a wide particle size distribution, and more particularly to a circulating fluidized bed furnace for preliminary reduction of iron ore to produce iron by melt-To an iron ore preliminary reduction furnace which optimizes the reduction operation of iron ores.;A second preliminary reducing furnace 20 connected to the first preliminary reducing furnace 10 to reduce heavy iron ore and a plurality of cyclones 20, 30) 40 to preliminarily reduce iron ore in two stages.;According to the present invention, it is possible to stabilize the flow of iron ore while uniformly maintaining the concentration distribution of iron ore, obtain a reduced iron having a relatively good reduction ratio even in a long-time operation, and prevent the phenomenon that the circulation pipe is clogged.