| 摘要 |
<p>The invention is directed to process and apparatus for supplying pre-reduced iron oxides to a smelting vessel by directing a hot reducing offgas form the vessel into a vertical riser duct without substantial cooling of the offgas and entraining particulate iron oxide containing material in the hot reducing offgas as the gas is conveyed upwardly through the duct. The hot gas heats the entrained material to a temperature at which partial reduction of the iron oxide occurs, the hot gas thereby losing sensible heat. Additional materials may be introduced to the duct for entrainment in the gas. Particulate material is separated from the gas and the partially reduced material is introduced to the smelting vessel. The particulate material, or part of it, may be recycled through one vertical riser duct before the partially reduced material is introduced to the smelting vessel and only part of the hot reducing offgas emitted by the vessel may be directed into the duct. Apparatus for performing the process is also described and claimed.</p> |
