| 摘要 |
<p>PCT No. PCT/AT96/00140 Sec. 371 Date Apr. 11, 1997 Sec. 102(e) Date Apr. 11, 1997 PCT Filed Aug. 1, 1996 PCT Pub. No. WO97/07247 PCT Pub. Date Feb. 27, 1997A process for producing liquid pig iron or liquid steel preproducts and sponge iron from iron ore. The iron ore in a first reduction zone (4) is directly reduced to sponge iron. The sponge iron in a meltdown gasifying zone (10) is melted under the supply of carbon carriers and an oxygen-containing gas, and a reducing gas containing CO and H2 is produced. The reducing gas is introduced into the first reduction zone (4), is reacted there, and is drawn off as an export gas. The drawn-off export gas is subjected to CO2 elimination as well as heating, and as a reducing gas, at least largely free of CO2, is fed to at least one further reduction zone (29) for the direct reduction of iron ore. In order to enable the export gas drawn off the further reduction zone (29) to be utilized as completely as possible, heat of the export gas leaving the further reduction zone (29) is used for heating the export gas derived from the first reduction zone (4).</p> |
