Abstract: 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(FeAl₂O₄) was disappeared and Al-andalusite (Al₆Si₂O₁₃) was appeared，metallic iron particles increased and grew up with temperature rose，and the purity improved.

Key words: Fine-grained disseminated hematite ore, Deep reduction, Reduction temperature, Metallic iron particle, Thermodynamic behavior