| 摘要 |
<p>The invention relates to a method for reprocessing steel slags and ferriferous materials, e.g. electric furnace slags, converter slags, fine ores, dusts from steel manufacturing, millscale for obtaining pig iron and environmentally safe slags, wherein a molten slag and an iron bath are used at a volume ratio ranging between 0.5:1 and 1.5:1, wherein carboniferous material is introduced in the bath and hot air is blown. A mixed slag is obtained from the initial slags and the ferriferous materials having alkalinity CaO/SiO2 ranging between 1.2 and 2.5 and placed in a hearth type furnace or a ladle, wherein hot air for post-combustion of CO formed from the carbon in the bath is blown with a post-combustion degree of PC = (a) (CO2 + H2O)/(CO + CO2 + H2 + H2O) between 0.70 and 0.85. The hot exhaust gases of the furnace or the ladle are evacuated tangentially to the axis of the mouth of the hot air feeding lance.</p> |
