| 摘要 |
<p>PURPOSE: A method is provided for producing liquid pig iron from fine particle iron-oxide carriers and lumpy ferriferous material in a melt-down gasification area of a melt-down gasifier, the ferriferous material is molten down in the melt-down gasifier along with the feeding of material containing carbon and gas containing oxygen and the simultaneous formation of a reducing gas on a bed formed by solid carbon carriers. CONSTITUTION: Fine-particle iron-oxide carriers, such as ferriferous fine ore and ore dust and oxidic iron fine dust are fed into the reducing gas stream coming out of the melt-down gasifier (3). A reducing gas is then freed from the resulting fine particle material. A released fine particle material is fed into a melt-down gasification area (9) through a dust recycling line (26, 27, 28, 29) by means of a dust burner (30) and the reducing gas for deoxidizing the ferriferous material is drawn in. To be able to use large quantities of fine ore or ore dust in the disclosed method, the released fine particle material in the dust recycling line (26 to 29) is fed to the dust burner (30) through a fluidized bed sluice (25), formed by the released fine particle material and the reducing gas.</p> |
