| 摘要 |
<p>According to a process for producing pig iron (10) from fine-particulate iron oxide carriers and lumpy iron-containing material in a meltdown gasifying zone (9) of a melter gasifier (3), the iron-containing material is melted in a bed (13) formed of solid carbon carriers, under the supply of carbon-containing material and oxygen-containing gas while simultaneously forming a reducing gas. Fine-particulate iron-oxide carriers, such as iron-containing fine ore and ore dust and oxidic iron fine dust, are introduced into a reducing gas stream leaving the melter gasifier (3), and the reducing gas is separated from the fine-particulate material formed thereby. The separated fine-particulate material is introduced into the meltdown gasifying zone (9) via a dust recirculation line (26, 27, 28, 29) and through a dust burner (30), and the reducing gas is used for reducing iron-oxide-containing material. To be able to charge large amounts of fine ore or ore dust in this process, the separated fine-particulate material in the dust recirculation line (26 to 29) is conveyed via a fluidized bed sluice (25) formed by the separated fine-particulate material and by reducing gas to the dust burner (30) and reduced thereby (FIG. 1).</p> |
