| 摘要 |
<p>1,214,626. Reducing iron ores. INDIAN IRON & STEEL CO. Ltd. March 5, 1968 [Jan. 10, 1967], No.1400/67. Heading C7D. Sponge iron agglomerate for fading to a blast or other melting furnace is produced by feeding unagglomerated haematite iron ore fines "as received" at the ore treating plant directly to a rotary kiln and reducing with solid carbon e.g. coal, separating sponge iron from the product discharged, grinding and magnetically separating the fine ground sponge iron concentrate e.g. under wet conditions, and agglomerating e.g. pelletising and heat-hardening in the rotary kiln. Preferably reduction is effected at not-more than 1100‹C. in presence of limestone and/or dolomite flux. Unburnt coal recovered may be recycled.</p> |
