| 摘要 |
<p>PCT No. PCT/AT96/00190 Sec. 371 Date Jul. 24, 1997 Sec. 102(e) Date Jul. 24, 1997 PCT Filed Oct. 8, 1996 PCT Pub. No. WO97/13879 PCT Pub. Date Apr. 17, 1997With a process for the direct reduction of particulate iron-containing material by fluidization, reformed gas, at least partially freed from CO2, is supplied to a fluidized-bed reduction zone as a reducing gas and is carried off from the same as a top gas and at least a portion of the top gas together with reformed gas is utilized for direction reduction. To economize on parts of the plant that are impinged on by reducing gas and in order to achieve savings in terms of heating costs, CH4 and N2 are, in addition to CO2, at least partially removed by adsorption, from 50 to 100% of the reformed as and 0 to 100% of the top gas, and the tail gas removed from the reformed gas and/or the top gas by adsorption is utilized as a heating gas.</p> |
