中文摘要：

深度还原是处理细粒浸染赤铁矿石的高效技术,还原温度是影响深度还原效果的主要因素之一。用深度还原—弱磁选技术处理澳大利亚某赤铁矿石,在1 523 K条件下能获得金属化率为92.30%还原产物,弱磁选可获得铁品位为78.11%、铁回收率为97.75%的金属铁粉。XRD、SEM-EDS分析表明,还原温度从1 473 K上升至1 523K,绝大部分化合态的铁被还原为金属铁,铁尖晶石（Fe Al2O4）的衍射峰消失,铝红柱石（Al6Si2O（13））的衍射峰出现,还原产物表面出现金属铁颗粒,且随还原温度的升高而增多、长大,纯度也有所提高。

英文摘要：

Deep reduction is an efficient technology in dealing with the fine-grained disseminated hematite ore,reduction temperature plays an important role in the effect of deep reduction. The deep reduction-low intensity magnetic separation technology was used to dealing with the hematite ore from Australia,the reduction product can obtain 92. 30% metallization rate under the reduction temperature of 1 523 K,and concentrate with TFe grade of 78. 11%,iron recovery 97. 75% will be obtained after the low intensity magnetic process. The X-ray diffraction,scanning electron microscope,EDS energy spectrum analysis results showed that the vast majority of the combined state of iron was reduced into metallic iron along with the reduction temperature rose from 1 473 K to 1 523 K,spinel（ Fe Al2O4） was disappeared and Al-andalusite（ Al6Si2O（13）） was appeared,metallic iron particles increased and grew up with temperature rose,and the purity improved.